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Prior Experience (prior + experience)

Distribution by Scientific Domains

Medical Sciences	26%
Life Sciences	26%
Business, Economics, Finance and Accounting	23%
Psychology	11%
Humanities and Social Sciences	4%
2 Other Domains	10%

Selected Abstracts

Influence of Age and Prior Experience on Territorial Behavior and the Costs of Defense in Male Collared Lizards

ETHOLOGY, Issue 1 2007
Andrew M. Schwartz
In polygynous species where males maintain strong interseasonal philopatry to the same breeding territories, older individuals have prior experience defending their areas, whereas younger individuals are defending a territory for the first time. Theoretical and empirical studies predict that under such conditions the cumulative costs of defense may be lower for older experienced males as a consequence of familiarity with environmental and/or social conditions in their particular local habitats. We used quantitative data from focal observational studies and introduction experiments to test the hypothesis that older collared lizard males (Crotaphytus collaris) with prior territorial experience (3 yr+ males) acquire larger territories allowing them to court more, different females, with greater frequency without incurring higher defense costs. Consistent with this hypothesis, 3 yr+ males controlled significantly larger territories and courted more females, without having significantly higher rates of territory patrol, frequencies of advertisement display, or aggressive interactions with same-sex competitors. Moreover, the intensity of responses to size- and age/experience-matched tethered intruders by 3 yr+ males was lower than that by 2 yr males in their first season of territory defense. Our results support the hypothesis that age/prior occupancy of territories lowers defense costs allowing males to defend larger areas and increase opportunities to court females, perhaps increasing mating opportunities. By contrast, 2 yr males may need to respond more aggressively to intruders because their ownership of territories is tenuous as a consequence of shorter territory occupancy. [source]

Tests of a Dynamic Systems Account of the A-not-B Error: The Influence of Prior Experience on the Spatial Memory Abilities of Two-Year-Olds

CHILD DEVELOPMENT, Issue 5 2001
John P. Spencer
Recently, Smith, Thelen, and colleagues proposed a dynamic systems account of the Piagetian "A-not-B" error in which infants' errors result from general processes that make goal-directed actions to remembered locations. Based on this account, the A-not-B error should be a general phenomenon, observable in different tasks and at different points in development. Smith, Thelen, et al.'s proposal was tested using an A-not-B version of a sandbox task. During three training trials and three "A" trials, 2-year-olds watched as a toy was buried in a sandbox at Location A. Following a 10-s delay, children searched for the object. Across five experiments, children's (total N= 92) performance on the A trials was accurate. After the A trials, children watched as a toy was hidden at Location B, 8 to 10 inches from Location A. In all experiments, children's searches after a 10-s delay were significantly biased in the direction of Location A. Furthermore, this bias toward Location A decreased with repeated trials to Location B, as well as when children completed fewer trials to Location A. Together, these data suggest that A-not-B,type errors are pervasive across tasks and development. [source]

Geographic Mobility and Spatial Assimilation among U. S. Latino Immigrants,

INTERNATIONAL MIGRATION REVIEW, Issue 3 2005
Scott J. South
Although the spatial assimilation of immigrants to the United States has important implications for social theory and social policy, few studies have explored the atterns and determinants of interneighborhood geographic mobility that lead to immigrants'residential proximity to the white, non-Hispanic majority. We explore this issue by merging data from three different sources - the Latino National Political Survey, the Panel Study of Income Dynamics, and tract-level census data - to begin unraveling causal relationships among indicators of socioeconomic, social, cultural, segmented, and spatial assimilation. Our longitudinal analysis of 700 Mexican, Puerto Rican, and Cuban immigrants followed from 1990 to 1995 finds broad support for hypotheses derived from the classical account of minority assimilation. High income, English language use, and embeddedness in Anglo social contexts increase Latino immigrants'geographic mobility into Anglo neighborhoods. U. S. citizenship and years spent in the United Stares are ppsidvely associated with geographic mobility into more Anglo neighbor oods, and coethnic contact is inversely associated with this form of mobility, but these associations operate largely through other redictors. Prior experiences of ethnic discrimination increase and residence in public housing decreases the likelihood that Latino immigrants will move from their origin neighborhoods, while residing in metropolitan areas with large Latino populations leads to geographic moves into "less Anglo" census tracts. [source]

Enterprise Education: Influencing Students' Perceptions of Entrepreneurship

ENTREPRENEURSHIP THEORY AND PRACTICE, Issue 2 2003
Nicole E. Peterman
This research examines the effect of participation in an enterprise education program on perceptions of the desirability and feasibility of starting a business. Changes in the perceptions of a sample of secondary school students enrolled in the Young Achievement Australia (YAA) enterprise program are analysed using a pre-test post-test control group research design. After completing the enterprise program, participants reported significantly higher perceptions of both desirability and feasibility. The degree of change in perceptions is related to the positiveness of prior experience and to the positiveness of the experience in the enterprise education program. Self-efficacy theory is used to explain the impact of the program. Overall, the study provides empirical evidence to support including exposure to entrepreneurship education as an additional exposure variable in entrepreneurial intentions models. [source]

The Smell of New Competitors: The Response of American Mink, Mustela vison, to the Odours of Otter, Lutra lutra and Polecat, M. putorius

ETHOLOGY, Issue 5 2009
Lauren A. Harrington
We tested the response of wild American mink (an established alien species in the UK), to the odours of unfamiliar mink, European polecat and Eurasian otter. Polecats are similar in size and habits to mink, otters are larger than mink and a dominant competitor; both are native to the UK and both were absent during the original colonization by mink but are now undergoing natural population recoveries. The response of mink to experimental odours was assessed by counting the numbers of tracks (footprints) on rafts treated with anal gland secretions, and compared with response to a control raft, on two rivers in the Upper Thames valley, UK. Remote video showed that the number of tracks was positively correlated with the time that mink spent investigating an odour. We found that mink were attracted to the odours of both unfamiliar mink and polecats. There was little evidence that mink avoided the odour of otters. We suggest that, during an encounter with a polecat, mink may behave much as they would to a conspecific. We infer from the response of mink to the odour of otters, that, if mink do avoid otters, the mechanism of avoidance is likely to be complex, situation-dependent and perhaps affected by prior experience. [source]

Persistence of Alarm-Call Behaviour in the Absence of Predators: A Comparison Between Wild and Captive-Born Meerkats (Suricata Suricatta)

ETHOLOGY, Issue 11 2007
Linda I. Hollén
Performing correct anti-predator behaviour is crucial for prey to survive. But, are such abilities lost in species or populations living in predator-free environments? How individuals respond to the loss of predators has been shown to depend on factors such as the degree to which anti-predator behaviour relies on experience, the type of cues evoking the behaviour, the cost of expressing the behaviour and the number of generations under which relaxed selection has taken place. Here we investigated whether captive-born populations of meerkats (Suricata suricatta) used the same repertoire of alarm calls previously documented in wild populations and whether captive animals, as wild ones, could recognize potential predators through olfactory cues. We found that all alarm calls that have been documented in the wild also occurred in captivity and were given in broadly similar contexts. Furthermore, without prior experience of odours from predators, captive meerkats seemed to distinguish between faeces of potential predators (carnivores) and non-predators (herbivores). Despite slight structural differences, the alarm calls given in response to the faeces largely resembled those recorded in similar contexts in the wild. These results from captive populations suggest that direct, physical interaction with predators is not necessary for meerkats to perform correct anti-predator behaviour in terms of alarm-call usage and olfactory predator recognition. Such behaviour may have been retained in captivity because relatively little experience seems necessary for correct performance in the wild and/or because of the recency of relaxed selection on these populations. [source]

Influence of Age and Prior Experience on Territorial Behavior and the Costs of Defense in Male Collared Lizards

Intra- and Inter-seasonal Variation in the Socio-Spatial Behavior of Adult Male Collared Lizards, Crotaphytus collaris (Reptilia, Crotaphytidae)

ETHOLOGY, Issue 1 2001
Troy A. Baird
When individuals maintain strong inter-seasonal philopatry to the same territories, males may be able to re-establish territory occupancy without intense intra-sexual aggression, and instead spend more time courting females early in the reproductive season. Furthermore, when some males have prior experience defending the same territories, it may be necessary for young males to exhibit higher levels of aggression because they are establishing a territory for the first time. We tested these hypotheses by examining within-season (1992 and 1997) temporal variation in the social behavior of adult male collared lizards of known age and prior territorial experience in a population where inter-season philopatry to territories is high. Contrary to expectations, the frequency of aggression exhibited by males with and without prior territorial experience did not differ. The frequency of intra-sexual aggression was higher in 1992 than in 1997, perhaps because male competitors were more abundant in 1992. Although there was an interactive effect of year, male display and patrol were low at the beginning of the reproductive season in Apr. and May, reached peaks during midseason in June, and then decreased as reproduction ended in July. The size of territories showed a similar pattern, with males defending larger areas in June. Our data support the philopatry hypothesis in that the establishment of territories occurred without high levels of aggression early in the season, perhaps because territory boundaries have been well defined by high rates of patrol and advertisement during the middle of the previous season. Inter-sexual interactions were most frequent in June rather than at the beginning of the reproductive season. Adult females are producing their second clutches and yearling females are producing their first clutches in June. The high rate of inter-sexual encounters in June supports the hypothesis that males allocate more time to courtship when females are receptive because there are more reproductively active females at this time. The temporal pattern of activities in adult Crotaphytus collaris appears to function as a compromise between competing intra- and inter-sexual social demands on males, allowing males to maximize mating opportunities as well as maintain future access to productive territories. [source]

Previous experience of withdrawal from chronic diazepam ameliorates the aversiveness of precipitated withdrawal and reduces withdrawal-induced c-fos expression in nucleus accumbens

EUROPEAN JOURNAL OF NEUROSCIENCE, Issue 4 2000
Sarah J. Dunworth
Abstract Flumazenil (20 mg/kg, i.p.)-precipitated withdrawal from chronic treatment with diazepam (DZP, 15 mg/kg, s.c. in sesame oil for 21 days) resulted in a decreased seizure threshold to the convulsant, pentylenetetrazole (PTZ), infused into the tail vein; withdrawal from 21-day chronic diazepam treatment, interspersed with two periods of drug withdrawal, resulted in a greater decrease in convulsant threshold. A separate experiment showed that consumption of a sucrose solution immediately prior to precipitated withdrawal resulted in a decreased subsequent consumption of the sucrose solution; no such evidence of a conditioned taste aversion (CTA) was seen in mice given prior experience of withdrawal. Thus, prior experience of withdrawal enhanced the effects of a subsequent precipitated withdrawal in increasing seizure sensitivity, but weakened the ability of this withdrawal to serve as an aversive unconditioned stimulus (US). The weakening of the aversive properties of precipitated withdrawal may reflect habituation to the withdrawal stimulus, and was accompanied by a loss of the ability of withdrawal to induce c-fos expression in the shell of the nucleus accumbens, an area sensitive to both novel, and stressful, as well as rewarding stimuli. [source]

Learning associations between places and visual cues without learning to navigate: Neither fornix nor entorhinal cortex is required

HIPPOCAMPUS, Issue 4 2003
E.A. Gaffan
Abstract Rats with fornix transection, or with cytotoxic retrohippocampal lesions that removed entorhinal cortex plus ventral subiculum, performed a task that permits incidental learning about either allocentric (Allo) or egocentric (Ego) spatial cues without the need to navigate by them. Rats learned eight visual discriminations among computer-displayed scenes in a Y-maze, using the constant-negative paradigm. Every discrimination problem included two familiar scenes (constants) and many less familiar scenes (variables). On each trial, the rats chose between a constant and a variable scene, with the choice of the variable rewarded. In six problems, the two constant scenes had correlated spatial properties, either Allo (each constant appeared always in the same maze arm) or Ego (each constant always appeared in a fixed direction from the start arm) or both (Allo + Ego). In two No-Cue (NC) problems, the two constants appeared in randomly determined arms and directions. Intact rats learn problems with an added Allo or Ego cue faster than NC problems; this facilitation provides indirect evidence that they learn the associations between scenes and spatial cues, even though that is not required for problem solution. Fornix and retrohippocampal-lesioned groups learned NC problems at a similar rate to sham-operated controls and showed as much facilitation of learning by added spatial cues as did the controls; therefore, both lesion groups must have encoded the spatial cues and have incidentally learned their associations with particular constant scenes. Similar facilitation was seen in subgroups that had short or long prior experience with the apparatus and task. Therefore, neither major hippocampal input,output system is crucial for learning about allocentric or egocentric cues in this paradigm, which does not require rats to control their choices or navigation directly by spatial cues. Hippocampus 2003;13:445,460. © 2003 Wiley-Liss, Inc. [source]

Getting the most from MBA internships: Promoting intern learning and job acceptance

HUMAN RESOURCE MANAGEMENT, Issue 1 2010
Gerard Beenen
Abstract MBA internships are commonly used for training and recruiting management talent. Yet, research overlooks what makes them effective. A longitudinal study investigates the relationships that goal clarity, autonomy, and prior experience have with MBA intern learning and job acceptance intentions. Results show learning partially mediates the relationship of goal clarity to job acceptance intentions, and that less experienced MBA interns learn more under conditions of high goal clarity and low autonomy (i.e., when their roles are more structured). We discuss how role structures and learning can inform effective training and recruiting of interns, and management of short-term workers in general. © 2010 Wiley Periodicals, Inc. [source]

The role of the mother's voice in developing mother's face preference: Evidence for intermodal perception at birth

INFANT AND CHILD DEVELOPMENT, Issue 1 2005
F. Z. Sai
Abstract Four experiments are described which investigated the role of the mother's voice in facilitating recognition of the mother's face at birth. Experiment 1 replicated our previous findings (Br. J. Dev. Psychol. 1989; 7: 3,15; The origins of human face perception by very young infants. Ph.D. Thesis, University of Glasgow, Scotland, UK, 1990) indicating a preference for the mother's face when a control for the mother's voice and odours was used only during the testing. A second experiment adopted the same procedures, but controlled for the mother's voice from birth through testing. The neonates were at no time exposed to their mother's voice. Under these conditions, no preference was found. Further, neonates showed only few head turns towards both the mother and the stranger during the testing. Experiment 3 looked at the number of head turns under conditions where the newborn infants were exposed to both the mother's voice and face from birth to 5 to 15 min prior to testing. Again, a strong preference for the mother's face was demonstrated. Such preference, however, vanished in Experiment 4, when neonates had no previous exposure to the mother's voice,face combination. The conclusion drawn is that a prior experience with both the mother's voice and face is necessary for the development of face recognition, and that intermodal perception is evident at birth. The neonates' ability to recognize the face of the mother is most likely to be rooted in prenatal learning of the mother's voice. Copyright © 2004 John Wiley & Sons, Ltd. [source]

Low cost autologous peripheral blood stem cell transplantation performed in a municipal hospital for a patient with plasma cell leukaemia

INTERNATIONAL JOURNAL OF LABORATORY HEMATOLOGY, Issue 3 2002
K. Ghosh
Autologous peripheral blood stem cell transplantation (PBSCT) is a costly procedure. In India, the cost varies from US$20 000 to 25 000 and most patients cannot afford it. Using several cost-cutting measures, we were able to treat a patient with plasma cell leukaemia by autologous PBSCT. A 42-year-old-male presented with plasma cell leukaemia. He was treated with VAD therapy, followed by high-dose cyclophosphamide and granulocyte colony-stimulating factor (G-CSF) for mobilization of peripheral blood stem cells. The patient was conditioned with high dose melphalan, followed by autologous PBSCT. The procedure was performed in a municipal hospital in which there was no prior experience with stem cell transplantation. Costs were reduced by: (i) using oral medication whenever possible; (ii) having a relative of the patient prepare his food under medical guidance; (iii) starting G,CSF on day 7 rather than on day 1; (iv) short-term storage of the PBSC in an ordinary refrigerator at 4 °C without cryopreservation; (v) infusing a large number of CD34+ cells, which shortened the time to engraftment; (vi) delegating many of the functions of a marrow transplant nurse to a resident physician. The cost of transplantation was thereby reduced to about US$ 6000, with successful engraftment by day +13. The patient remained in remission for 7 months, after which he relapsed and was treated with chemotherapy and electron beam radiation to the skin. [source]

Model explaining the predisposition to donate blood from the social marketing perspective

INTERNATIONAL JOURNAL OF NONPROFIT & VOLUNTARY SECTOR MARKETING, Issue 3 2009
Asunción Beerli-Palacio
The purpose of this research is to develop a model of the explanatory factors that determine the predisposition to donate blood in order to improve the effectiveness of donor recruitment and retention programs. A personal survey was conducted on a sample of 303 potential donors between 18 and 60 years old and from both sexes, who are resident in Las Palmas de Gran Canaria (Spain) and have either never donated blood or not donated in the last 3 years. The findings lead us to say that the predisposition to donate blood is positively influenced by the information that the potential donor has about the requirements to become a donor, and by the motivations to donate blood. It is negatively influenced by the inhibiting factor of fear of the extraction procedure and its after-effects. However, prior experience as a donor and links with reference groups who are donors do not have any direct influence on the predisposition. These findings suggest that it is necessary (1) to design communication campaigns in which information and education are the goals, and which aim to make donation a habit; (2) to clarify to society the need for blood donation and to describe the process of donation in order to eliminate those inhibitors linked to fear and the perception of risks; (3) to design advertising campaigns focused on rational messages since information exercises a greater influence on the predisposition to donate than motivations linked to altruism; (4) to recommend that no great efforts be made to recapture previous donors, since experience is not a direct antecedent of the predisposition to donate but an indirect antecedent via information and (5) to stimulate word-of-mouth among reference groups using member-get-member programs whereby current donors bring new donors to the system. Copyright © 2008 John Wiley & Sons, Ltd. [source]

Relationships between prior experience of training, gender, goal orientation and training attitudes

INTERNATIONAL JOURNAL OF TRAINING AND DEVELOPMENT, Issue 3 2007
Anupama Narayan
Relationships were examined between prior experience with training, goal orientation, gender and training attitudes. Participants (n = 165) had a minimum of six months of work experience. Results from regression analyses indicated that mastery-approach goal orientation had a beneficial effect on training attitudes for men but not for women. In addition, prior experience with training had a beneficial effect on training attitudes, and women had more favorable attitudes than men. The results provide initial evidence that gender moderates goal orientation effects in training contexts. [source]

Staff Activity in Supported Housing Services

JOURNAL OF APPLIED RESEARCH IN INTELLECTUAL DISABILITIES, Issue 4 2002
David Felce
Background Variation in staff performance between small community housing services indicates the need for research on the factors which predict high-quality care. Methods The associations between service sector, staffing levels, staff characteristics, internal organization or working practices, non-institutional milieu, and staff activity and the nature and extent of staff attention to residents were explored in a study of 10 statutory, 10 voluntary and nine private sector community housing schemes. Results There were few significant differences between sectors after differences in resident abilities were taken into account. Higher staff to resident ratios predicted greater resident receipt of attention and assistance but also a lower proportion of time during which each member of staff was directly concerned with residents. A greater range in resident ability predicted lower resident receipt of attention and assistance. A higher proportion of qualified staff was not shown to be a positive attribute but greater prior experience was associated with staff spending more time directly concerned with residents, less time doing ,other' activity and residents receiving more assistance. Measures of the internal organization and non-institutional milieu of the settings were not strongly related to staff activity. Conclusions The findings are consistent with previous research that there are diminishing marginal returns associated with increasing staff. Size of residence was unimportant. Links between service organization and staff performance require further research but retaining experienced staff appears to be important. As resident receipt of attention and assistance was unrelated to their adaptive behaviour level, there is a need to find ways to ensure that staff support matches the needs of residents better. [source]

A review of the factors involved in older people's decision making with regard to influenza vaccination: a literature review

JOURNAL OF CLINICAL NURSING, Issue 1 2008
Leigh Ward BSc
Aims and objectives., The aim of this paper was to develop an understanding of the factors involved in older people's decision making with regard to influenza vaccination to inform strategies to improve vaccine uptake and reduce morbidity and mortality. Background., Influenza is a major cause of morbidity and mortality world-wide. In the UK, it accounts for 3000,6000 deaths annually; 85% of these deaths are people aged 65 and over. Despite this, and the widespread and costly annual government campaigns, some older people at risk of influenza and the associated complications remain reluctant to take advantage of the offer of vaccination. Methods., A review of the English language literature referring to older people published between 1996 and 2005 was the method used. Inclusion and exclusion criteria were identified and applied. Results., The majority of the literature was quantitative in nature, investigating personal characteristics thought to be predictors of uptake, such as age, sex, co-morbidity, educational level, income and area of residence. However, there was little discussion of the possible reasons for the significance of these factors and conflict between findings was often evident, particularly between studies employing different methodologies. Other factors identified were prior experience, concerns about the vaccine, perceived risk and advice and information. Relevance to clinical practice., The wealth of demographic information available will be useful at a strategic level in targeting groups identified as being unlikely to accept vaccination. However, the promotion of person-centred ways of working that value the health beliefs, attitudes, perceptions and subjective experiences of older people is likely to be more successful during individual encounters designed to promote acceptance. Without more research in investigating these concepts, our understanding is inevitably limited. [source]

Consumer knowledge and use of country-of-origin information at the point of purchase

JOURNAL OF CONSUMER BEHAVIOUR, Issue 2 2004
John P. Liefeld
Abstract This paper reports an investigation of American and Canadian consumer acquisition and/or knowledge of the country of origin of products at the time of purchase. Consumer knowledge of the country of origin of purchased products was tested as purchasers left the cash register. If the purchaser knew the country of origin of the product just purchased, they were further questioned to discover the role such knowledge might have played in their choice between alternatives. More than 93 per cent of 1,248 purchasers intercepted at the cash register had not acquired while shopping, or did not know from prior experience, the country of origin of a product they had just purchased. Of the 91 (6.5 per cent) who had acquired or knew the country of origin of a product they had just purchased, only 27 (2.2 per cent of the total) indicated that their knowledge of the product's country of origin possibly might have played a role in their product choice. These findings reveal that the country of origin of products is not an important attribute in the choice processes of the great majority of North American consumers. Confirmation of these findings by replication with less obtrusive and more externally valid measures of consumer acquisition and use of product information prior to purchase is needed. Copyright © 2004 Henry Stewart Publications. [source]

Bayeswatch: an overview of Bayesian statistics

JOURNAL OF EVALUATION IN CLINICAL PRACTICE, Issue 2 2002
Peter C. Austin PhD
Abstract Increasingly, clinical research is evaluated on the quality of its statistical analysis. Traditionally, statistical analyses in clinical research have been carried out from a ,frequentist' perspective. The presence of an alternative paradigm , the Bayesian paradigm , has been relatively unknown in clinical research until recently. There is currently a growing interest in the use of Bayesian statistics in health care research. This is due both to a growing realization of the limitations of frequentist methods and to the ability of Bayesian methods explicitly to incorporate prior expert knowledge and belief into the analyses. This is in contrast to frequentist methods, where prior experience and beliefs tend to be incorporated into the analyses in an ad hoc fashion. This paper outlines the frequentist and Bayesian paradigms. Acute myocardial infarction mortality data are then analysed from both a Bayesian and a frequentist perspective. In some analyses, the two methods are seen to produce comparable results; in others, they produce different results. It is noted that in this example, there are clinically relevant questions that are more easily addressed from a Bayesian perspective. Finally, areas in clinical research where Bayesian ideas are increasingly common are highlighted. [source]

Environmental enrichment and prior experience of live prey improve foraging behaviour in hatchery-reared Atlantic salmon

JOURNAL OF FISH BIOLOGY, Issue 2003
C. Brown
Atlantic salmon salmo salar L. parr were reared for 3 months under standard hatchery conditions or in a structurally enriched tank (containing plants, rocks and novel objects). Half of each of these fish had prior exposure to live prey in the form of live bloodworm while the other half were fed hatchery-pellets. After 12 days all fish were tested on a novel live prey item (brine shrimp). A significant interaction between the two factors (prior exposure to live prey and rearing condition) revealed that foraging performance was only enhanced in fish that had been reared in a complex environment and exposed to live prey. It appears that the ability to generalize from one live prey type to another is only enhanced in fish that had been reared in an enriched environment. The findings support the assertion that the provision of enriched environments in combination with exposure to live prey prior to release may significantly improve the post-release survival rates of hatchery-reared fishes. As both the environmental enrichment and the prior foraging experience procedures were comparatively simple, the provision of such pre-release experiences are likely to prove cost effective to hatcheries. [source]

Alliance Capability as a Mediator Between Experience and Alliance Performance: An Empirical Investigation into the Alliance Capability Development Process*

JOURNAL OF MANAGEMENT STUDIES, Issue 1 2007
Koen H. Heimeriks
abstract This study centres around the way in which firms can enhance alliance performance through the development of alliance capabilities. Whereas most research has focused on inter-firm antecedents of alliance performance, research on intra-firm antecedents pointing to prior experience and internal mechanisms to foster knowledge transfer has only recently emerged. As little is known about how firms develop alliance capabilities, this study aims to uncover how differences in sources of alliance capabilities explain performance heterogeneity. The data are derived from a detailed survey held among alliance managers and Vice-Presidents of 151 firms. The survey covers over 2600 alliances for the period 1997,2001. This study not only finds that alliance capabilities partially mediate between alliance experience and alliance performance, but also yields novel insights into the micro-level building blocks underlying the process of alliance capability development. [source]

Learning oceanography from a computer simulation compared with direct experience at sea

JOURNAL OF RESEARCH IN SCIENCE TEACHING, Issue 1 2006
William Winn
Considerable research has compared how students learn science from computer simulations with how they learn from "traditional" classes. Little research has compared how students learn science from computer simulations with how they learn from direct experience in the real environment on which the simulations are based. This study compared two college classes studying introductory oceanography. One class learned using an interactive computer simulation based on a dynamic, three-dimensional model of physical oceanography. The other class learned by spending a day on a research ship using scientific tools and instruments to measure physical properties of the ocean directly. In classes preceding and following the simulation or field experience, students performed the same exercises regarding currents and salinity, had the same instructor presentations, and did the same homework. The study found that the field experience helped contextualize learning for students with little prior experience of the ocean while the simulation made it easier for students to connect what they learned from it to other content they learned in class. These and other findings shed light on what computer simulations can and cannot help students learn, and what concepts are best learned in the real environment. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 43: 25,42, 2006 [source]

Differences in Entrepreneurial Opportunities: The Role of Tacitness and Codification in Opportunity Identification,

JOURNAL OF SMALL BUSINESS MANAGEMENT, Issue 1 2009
Brett R. Smith
The role of opportunities in the entrepreneurial process remains relatively underdeveloped. To address this issue, we develop a definition of an entrepreneurial opportunity and draw upon a distinction from the domain of knowledge management to suggest a continuum of entrepreneurial opportunities ranging from codified to tacit. Though both traditional and contemporary research has examined how individual differences relate to the identification of opportunities, we focus instead on the importance of differences in the opportunities themselves. Specifically, we examine how relative differences in the degree of opportunity tacitness relate to the process of opportunity identification. We find that relatively more codified opportunities are more likely to be discovered through systematic search, whereas more tacit opportunities are more likely to be identified due to prior experience. These findings contribute to an increased understanding of the role of the opportunity in entrepreneurship research and have important implications for economic theories of entrepreneurship, entrepreneurial learning, entrepreneurial networks, and entrepreneurial education. [source]

Disruption of Maternal Behavior by Alcohol Intoxication in the Lactating Rat: A Behavioral and Metabolic Analysis

ALCOHOLISM, Issue 8 2002
Marta Yanina Pepino
Background Preweanling rats exhibit clear behavioral signs of distress after interacting with an alcohol-intoxicated dam. Interestingly, behavioral reactivity of infants to the experience of alcohol in the nursing context decreases as a function of repeated alcohol administrations to the mother. In this study, maternal activities were examined when dams were exposed to repeated administrations of a subnarcoleptic alcohol dose. Maternal changes in alcohol metabolism were also analyzed as a function of repeated exposures to the drug. Methods During postpartum days 3, 5, 7, 9, 11, and 13, nursing dams received an intragastric administration of either 2.5 g/kg of alcohol or water. Maternal behaviors were evaluated (experiment 1). Blood alcohol levels (BALs) of the dams were determined on postpartum day 16 after all mothers received either an intragastric (experiment 2) or an intraperitoneal (experiment 3) dose of alcohol. The doses used (2.5 g/kg intragastrically and 1.5 g/kg intraperitoneally) were chosen because they promote similar peak BALs in dams naive to alcohol. Results Maternal behaviors were strongly affected by the state of intoxication. Nevertheless, these disruptions clearly subsided with progression of alcohol-related experiences (experiment 1). Chromatographic analysis of alcohol metabolism indicated the development of tolerance in dams that had prior experience with alcohol (experiment 2). Changes in BALs as a function of prior experience with alcohol seemed related to first-pass alcohol metabolism rather than hepatic oxidative processes of the drug (experiments 2 and 3). Conclusions When the dam first experiences a moderate state of alcohol intoxication, maternal behaviors are uniformly disrupted. Subsequent exposures to alcohol lead to maternal metabolic tolerance. In conjunction with previous studies, these data indicate that infantile reactivity to alcohol is dependent on how the members of the dam/pup dyad express or perceive ethanol's postabsorptive effects. [source]

Attitudes of health sciences faculty members towards interprofessional teamwork and education

MEDICAL EDUCATION, Issue 9 2007
Vernon R Curran
Objectives, Faculty attitudes are believed to be a barrier to successful implementation of interprofessional education (IPE) initiatives within academic health sciences settings. The purpose of this study was to examine specific attributes of faculty members, which might relate to attitudes towards IPE and interprofessional teamwork. Methods, A survey was distributed to all faculty members in the medicine, nursing, pharmacy and social work programmes at our institution. Respondents were asked to rate their attitudes towards interprofessional health care teams, IPE and interprofessional learning in an academic setting using scales adopted from the peer-reviewed literature. Information on the characteristics of the respondents was also collected, including data on gender, prior experience with IPE, age and years of practice experience. Results, A total response rate of 63.0% was achieved. Medicine faculty members reported significantly lower mean scores (P < 0.05) than nursing faculty on attitudes towards IPE, interprofessional teams and interprofessional learning in the academic setting. Female faculty and faculty who reported prior experience in IPE reported significantly higher mean scores (P < 0.05). Neither age, years of practice experience nor experience as a health professional educator appeared to be related to overall attitudinal responses towards IPE or interprofessional teamwork. Conclusions, The findings have implications for both the advancement of IPE within academic institutions and strategies to promote faculty development initiatives. In terms of IPE evaluation, the findings also highlight the importance of measuring baseline attitudinal constructs as part of systematic evaluative activities when introducing new IPE initiatives within academic settings. [source]

Information systems project management decision making: The influence of experience and risk propensity

PROJECT MANAGEMENT JOURNAL, Issue 2 2008
Richard A. Huff
Abstract Managing information systems (IS) projects is a notoriously difficult task. The project manager is a crucial player in a successful IS development project. This research examines how a project manager's prior experience and risk propensity influence his or her decision making. An experiment was conducted that showed that both experience and risk propensity have significant influence on the decisions made. [source]

Effects of prior stimulus and prior perception on neural correlates of auditory stream segregation

PSYCHOPHYSIOLOGY, Issue 6 2009
Joel S. Snyder
Abstract We examined whether effects of prior experience are mediated by distinct brain processes from those processing current stimulus features. We recorded event-related potentials (ERPs) during an auditory stream segregation task that presented an adaptation sequence with a small, intermediate, or large frequency separation between low and high tones (,f), followed by a test sequence with intermediate ,f. Perception of two streams during the test was facilitated by small prior ,f and by prior perception of two streams and was accompanied by more positive ERPs. The scalp topography of these perception-related changes in ERPs was different from that observed for ERP modulations due to increasing the current ,f. These results reveal complex interactions between stimulus-driven activity and temporal-context-based processes and suggest a complex set of brain areas involved in modulating perception based on current and previous experience. [source]

Activated macrophages in the tumour microenvironment,dancing to the tune of TLR and NF-,B,

THE JOURNAL OF PATHOLOGY, Issue 2 2009
Simon Hallam
Abstract A large number of variables have been identified which appear to influence macrophage phenotype within the tumour microenvironment. These include reciprocal chemical and physical interactions with tumour cells and with non-malignant cells of the tumour microenvironment, tissue oxygen tension, and the origin and prior experience of the particular macrophage population. In this review we outline the key evidence for these influences and consider how macrophage phenotype is acquired and the relevance of the TLR,NF-,B pathway. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd. [source]

Innate aversion to ants (Hymenoptera: Formicidae) and ant mimics: experimental findings from mantises (Mantodea)

BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, Issue 1 2006
XIMENA J. NELSON
Field data suggest that ants may be important predators of mantises which, in turn, may be important predators of jumping spiders (Salticidae). Using a tropical fauna from the Philippines as a case study, the reactions of mantises to ants, myrmecomorphic salticids (i.e. jumping spiders that resemble ants) and ordinary salticids (i.e. jumping spiders that do not resemble ants) were investigated in the laboratory. Three mantis species (Loxomantis sp., Orthodera sp., and Statilia sp.) were tested with ten ant species, five species of Myrmarachne (i.e. myrmecomorphic salticids), and 23 ordinary salticid species. Two categories of the myrmecomorphic salticids were recognized: (1) ,typical Myrmarachne' (four species with a strong resemblance to ants) and (2) Myrmarachne bakeri (a species with less strong resemblance to ants). Ants readily killed mantises in the laboratory, confirming that, for the mantises studied, ants are dangerous. In alternate-day testing, the mantises routinely preyed on the ordinary salticids, but avoided ants. The mantises reacted to myrmecomorphic salticids similarly to how they reacted to ants (i.e. myrmecomorphic salticids appear to be, for mantises, Batesian mimics of ants). Although myrmecomorphic salticids were rarely eaten, M. bakeri was eaten more often than typical Myrmarachne. Because the mantises had no prior experience with ants, ant mimics or ordinary salticids, our findings suggest that mantises have an innate aversion to attacking ants and that this aversion is generalized to myrmecomorphic salticids even in the absence of prior experience with ants. © 2006 The Linnean Society of London, Biological Journal of the Linnean Society, 2006, 88, 23,32. [source]

Modulation of aggressive behaviour by fighting experience: mechanisms and contest outcomes

BIOLOGICAL REVIEWS, Issue 1 2006
Yuying Hsu
ABSTRACT Experience in aggressive contests often affects behaviour during, and the outcome of, later contests. This review discusses evidence for, variations in, and consequences of such effects. Generally, prior winning experiences increase, and prior losing experiences decrease, the probability of winning in later contests, reflecting modifications of expected fighting ability. We examine differences in the methodologies used to study experience effects, and the relative importance and persistence of winning and losing experiences within and across taxa. We review the voluminous, but somewhat disconnected, literature on the neuroendocrine mechanisms that mediate experience effects. Most studies focus on only one of a number of possible mechanisms without providing a comprehensive view of how these mechanisms are integrated into overt behaviour. More carefully controlled work on the mechanisms underlying experience effects is needed before firm conclusions can be drawn. Behavioural changes during contests that relate to prior experience fall into two general categories. Losing experiences decrease willingness to engage in a contest while winning experiences increase willingness to escalate a contest. As expected from the sequential assessment model of contest behaviour, experiences become less important to outcomes of contests that escalate to physical fighting. A limited number of studies indicate that integration of multiple experiences can influence current contest behaviour. Details of multiple experience integration for any species are virtually unknown. We propose a simple additive model for this integration of multiple experiences into an individual's expected fighting ability. The model accounts for different magnitudes of experience effects and the possible decline in experience effects over time. Predicting contest outcomes based on prior experiences requires an algorithm that translates experience differences into contest outcomes. We propose two general types of model, one based solely on individual differences in integrated multiple experiences and the other based on the probability contests reach the escalated phase. The difference models include four algorithms reflecting possible decision rules that convert the perceived fighting abilities of two rivals into their probabilities of winning. The second type of algorithm focuses on how experience influences the probability that a subsequent contest will escalate and the fact that escalated contests may not be influenced by prior experience. Neither type of algorithm has been systematically investigated. Finally, we review models for the formation of dominance hierarchies that assume that prior experience influences contest outcome. Numerous models have reached varied conclusions depending on which factors examined in this review are included. We know relatively little about the importance of and variation in experience effects in nature and how they influence the dynamics of aggressive interactions in social groups and random assemblages of individuals. Researchers should be very active in this area in the next decade. The role of experience must be integrated with other influences on contest outcome, such as prior residency, to arrive at a more complete picture of variations in contest outcomes. We expect that this integrated view will be important in understanding other types of interactions between individuals, such as mating and predator-prey interactions, that also are affected significantly by prior experiences. [source]