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Past Research (past + research)
Selected AbstractsTestosterone and dihydrotestosterone, but not estradiol, enhance survival of new hippocampal neurons in adult male ratsDEVELOPMENTAL NEUROBIOLOGY, Issue 10 2007Mark D. Spritzer Abstract Past research suggested that androgens may play a role in the regulation of adult neurogenesis within the dentate gyrus. We tested this hypothesis by manipulating androgen levels in male rats. Castrated or sham castrated male rats were injected with 5-Bromo-2,deoxyuridine (BrdU). BrdU-labeled cells in the dentate gryus were visualized and phenotyped (neural or glial) using immunohistochemistry. Castrated males showed a significant decrease in 30-day cell survival within the dentate gyrus but there was no significant change in cell proliferation relative to control males, indicating that androgens positively affect cell survival, but not cell proliferation. To examine the role of testosterone on hippocampal cell survival, males were injected with testosterone s.c. for 30 days starting the day after BrdU injection. Higher doses (0.5 and 1.0 mg/kg) but not a lower dose (0.25 mg/kg) of testosterone resulted in a significant increase in neurogenesis relative to controls. We next tested the role of testosterone's two major metabolites, dihydrotestosterone (DHT), and estradiol, upon neurogenesis. Thirty days of injections of DHT (0.25 and 0.50 mg/kg) but not estradiol (0.010 and 0.020 mg/kg) resulted in a significant increase in hippocampal neurogenesis. These results suggest that testosterone enhances hippocampal neurogenesis via increased cell survival in the dentate gyrus through an androgen-dependent mechanism. © 2007 Wiley Periodicals, Inc. Develop Neurobiol, 2007. [source] Superior detection of threat-relevant stimuli in infancyDEVELOPMENTAL SCIENCE, Issue 1 2010Vanessa LoBue The ability to quickly detect potential threat is an important survival mechanism for humans and other animals. Past research has established that adults have an attentional bias for the detection of threat-relevant stimuli, including snakes and spiders as well as angry human faces. Recent studies have documented that preschool children also detect the presence of threatening stimuli more quickly than various non-threatening stimuli. Here we report the first evidence that this attentional bias is present even in infancy. In two experiments, 8- to 14-month-old infants responded more rapidly to snakes than to flowers and more rapidly to angry than to happy faces. These data provide the first evidence of enhanced visual detection of threat-relevant stimuli in infants and hence offer especially strong support for the existence of a general bias for the detection of threat in humans. [source] An Analysis of Tenure and House Structure Type by Household CompositionFAMILY & CONSUMER SCIENCES RESEARCH JOURNAL, Issue 2 2007Stephanie E. Vanderford This study examined the relation of household composition and characteristics with each of two variables, tenure status and structural type of residence. Past research related to tenure status has considered household composition and characteristics in a limited manner, and very little empirical work has addressed the relations of those variables with house structure type. The three structure types assessed were manufactured housing, multifamily site-built homes, and single-family site-built homes. The authors extended past research by considering more complicated household compositions and also identified the importance of knowing more complete information about all the residents of a home to understand both tenure and house structure type. Family composition and the presence of extended family members, an unmarried partner, and other unrelated individuals all explained di ferences in tenure and house structure type. The findings suggest the significance of family and household characteristics when understanding variations in tenure and house structure type. [source] Feedbacks between phosphorus deposition and canopy cover: The emergence of multiple stable states in tropical dry forestsGLOBAL CHANGE BIOLOGY, Issue 1 2008MARCIA DeLONGE Abstract Dry forests represent a large percentage of tropical forests and are vulnerable to both anthropogenic and natural disturbances, yet important aspects of their sensitivity to disruption remain poorly understood. It is particularly unclear how changes in land-use or tropical storm patterns may affect the resiliency of phosphorus (P)-limited neotropical forests. In these systems, vegetation is sustained in the long-term by atmospheric P-inputs through rainfall, dust, or fog. Past research supports the idea that dust and fog deposition are dependent on canopy density (e.g. leaf area index). Thus, the canopy may function as a ,trap' for P, enabling a positive feedback between vegetation and P-deposition. We developed a conceptual model to investigate how Neotropical vegetation may respond to reduced P-deposition due to canopy losses. The model suggests that a canopy-deposition feedback may induce bistable vegetation dynamics; under some conditions, forests may be unable to naturally recover from relatively small disturbances. [source] Retention of chloride in soil and cycling of organic matter-bound chlorineHYDROLOGICAL PROCESSES, Issue 11 2005G. Öberg Abstract Chloride (Clinorg) is generally considered to be a hydrologically and chemically inert substance. Past research suggests that Clinorg participates in a complex biogeochemical cycle involving the formation of organically bound chlorine (Clorg). The present study examines whether Clorg cycling is sufficiently extensive as to influence the geochemical cycling of Clinorg. Undisturbed soil cores were collected in a coniferous forest soil in SE Sweden. The cores were stored in climate chambers for three months, irrigated with artificial rain, and the leachate was collected and analysed. The water balance of the lysimeters could be well described, and we found that 20,50% of the chlorine leached from the lysimeters was organically bound and that the amounts lost did not decrease with time. This strongly suggests that a substantial amount of Clorg forms in topsoil, and that subsequent leaching to deeper layers causes a considerable withdrawal of Clinorg. The concentration of both organic carbon and Clorg in the leachate was considerably higher than concentrations observed in the runoff in the actual catchment, suggesting that organic matter precipitates or is mineralized on its way through the soil. Copyright © 2005 John Wiley & Sons, Ltd. [source] Depression among older people with cognitive impairment: prevalence and detectionINTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY, Issue 7 2006Marita P. McCabe Abstract Background Past research has demonstrated that there is a high level of depression among older people, particularly for those with cognitive impairment and those in residential care. The current study was designed to determine the prevalence of depression among older people in hostels with cognitive impairment using a structured diagnostic interview. A further aim was to determine an appropriate screening instrument to detect depression within this population. It was also designed to evaluate the extent to which depression among these older people had previously been detected. Method Five commonly used depression scales were administered and compared to the results of the diagnostic interview. Results The results demonstrated that 38.9% of older people were diagnosed with depression, but that only 50% of these people had been previously diagnosed with this disorder. All scales showed some level of validity to detect depression. Conclusions The implications of these findings for our understanding of depression among older people with cognitive impairment are discussed. Copyright © 2006 John Wiley & Sons, Ltd. [source] The impact of creativity on performance in non-profitsINTERNATIONAL JOURNAL OF NONPROFIT & VOLUNTARY SECTOR MARKETING, Issue 4 2005Hilton Barrett This article examines how creative climate affects learning orientation and its relationship to organizational performance. The study also assesses creativity's link with market orientation, entrepreneurial orientation, and organizational flexibility. Past research on creativity climate has explored areas such as the arts, high-tech, information technology, media, and the sciences. The focus of this study is to assess creativity's role in managerial decision-making in the non-profit sector. Sound use of creativity can improve planning, implementation, and control by non-profit organization executives. Copyright © 2005 John Wiley & Sons, Ltd. [source] Online and off-line travel packages preferences: a conjoint analysisINTERNATIONAL JOURNAL OF TOURISM RESEARCH, Issue 1 2009Michael Chiam Abstract Past research has suggested that a number of travel package attributes impact on people's choices. In the present study the impacts of a number of these elements (price, package characteristics, travel agents and a seal of approval) in online and off-line environments were examined using conjoint analysis. It was found that price had the biggest impact, although travel agent and airline reputation and trustworthiness also impacted on people's preferences. Interestingly, there were no significant differences in the attributes' impacts in the online and off-line environments. Copyright © 2008 John Wiley & Sons, Ltd. [source] Aftershocks: Postwar Leadership Survival, Rivalry, and Regime DynamicsINTERNATIONAL STUDIES QUARTERLY, Issue 4 2004Michael Colaresi Under what conditions are leaders replaced after a war? Past research has reported that the outcome of the war and regime type affect postwar leadership tenure. Yet, this does not exhaust the conditions that could potentially influence political survival. In this article, I reexamine the links between regime type and leadership replacement after a war. I show that past research has failed to account for the dynamics of political leadership, and in the process has misrepresented the evidence supporting previous theories. I then show, using event history techniques, that both internal and external factors can alter leadership trajectories after a war. Specifically, war outcomes significantly affect the job security of a leader outside of international rivalry, but have less of an effect within rivalry. Additionally, relaxing various assumptions concerning the relationship between leadership survival and regime type leads to a richer understanding of the process of postwar leadership turnover. Finally, several propositions concerning the interaction between regime type and the costs of war are not supported in this analysis. [source] Attitudes Toward Affirmative Action: A Comparison of Color-Blind Versus Modern Racist AttitudesJOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 7 2005Germine H. Awad In the hotly contested issue of affirmative action, detractors maintain that the use of race-conscious policies to remedy past discrimination is contraindicative of a color-blind society. Supporters of affirmative action maintain that while a color-blind society may be desirable, acts of past discrimination and current institutional racism make it necessary to use race-conscious policies. Past research has shown that the demographic variables of race and sex, as well as modern racist attitudes predict attitudes toward affirmative action. This investigation examined the relationship between color-blind attitudes, modern racist attitudes, and attitudes toward affirmative action. Results confirmed a positive relationship between modern racism and color-blind attitudes. After controlling for race and sex, colorblind attitudes emerged as the strongest predictor of attitudes toward affirmative action, followed by modern racism. [source] Overcoming the winner's curse: an adaptive learning perspectiveJOURNAL OF BEHAVIORAL DECISION MAKING, Issue 1 2008Yoella Bereby-Meyer Abstract The winner's curse phenomenon refers to the fact that the winner in a common value auction, in order to actually win the auction, is likely to have overestimated the item's value and consequently is likely to gain less than expected and may even lose (i.e., it is said to be "cursed"). Past research, using the "Acquiring a company" task has shown that people do not overcome this bias even after they receive extensive feedback. We suggest that the persistence of the winner's curse is due to a combination of two factors: variability in the environment that leads to ambiguous feedback (i.e., choices and outcomes are only partially correlated) and the tendency of decision makers to learn adaptively. We show in an experiment that by reducing the variance in the feedback, performance can be significantly improved. Copyright © 2007 John Wiley & Sons, Ltd. [source] Evolution, origin and age of lineages in the Californian and Mediterranean florasJOURNAL OF BIOGEOGRAPHY, Issue 7 2009David D. Ackerly Abstract This paper addresses some of the conceptual issues involved in the analysis of the age and origin of mediterranean-climate plant taxa, paying particular attention to three topics: (1) the importance of an explicit time frame in the definition of biogeographical origins, (2) the distinction between the age of traits and the age of taxa, and (3) the idea of mediterranean-type ecosystems as environmental islands. (1) In California, recent analyses demonstrate that the diversity of species derived from different biogeographical origins is significantly correlated with temperature and precipitation gradients. These patterns support the hypothesis that niche conservatism is an important factor structuring modern diversity gradients. However, depending on how far back in time one looks, a species may be assigned to different origins; future discussions of biogeographical origins need to address the appropriate time frame for analysis. (2) Past research has demonstrated distinctive trait syndromes among woody plants of the Mediterranean, Chile, California and Mexico, and proposed that the syndromes are associated with lineages of different age in these floras. Reanalysis of individual traits demonstrates greater variability among regions than previously reported. The classification of plants into ,old' and ,new' genera is re-evaluated, and it is suggested that greater attention be paid to the age of traits, rather than to the age of taxa, especially at an arbitrary rank such as genus. (3) The idea of mediterranean-climate regions as ,climatic islands' is examined. Space,time diagrams of climate enable one to view the emergence of distinctive climatic regions in a continental context. The terms ,synclimatic' and ,anticlimatic' are proposed, referring to migration routes that parallel climate contours in space and time versus those that cross contours (including the case of geographic stasis in the face of climate change), respectively. Mediterranean-climate regions have served as important case studies in plant ecology and evolution, and merit continued close examination in the light of continued advances in phylogenetics and palaeoecology. [source] Antecedents of consumer relative preference for interpersonal information sources in pre-purchase searchJOURNAL OF CONSUMER BEHAVIOUR, Issue 5 2005Mehdi Mourali Abstract Past research has demonstrated clearly the importance of pre-purchase information search within the buying process. Scholars have identified several sources used by consumers in order to obtain information relevant to their purchase situation. Among the various information sources, interpersonal non-commercial sources seem to play an important role in consumers' choice decisions. The present study examines potential antecedents of consumer relative preference for interpersonal information search. The proposed antecedents include personality traits such as individuals' susceptibility to interpersonal influence, their need for cognition and their self-confidence, as well as individual differences in product knowledge and perceived risk associated with the purchase of a specific product. Using structural equation modelling on survey data (419 respondents), seven hypotheses , describing relationships between the diverse variables of the model , were tested. The results indicate that consumer relative preference for interpersonal information search was significantly influenced by consumers' susceptibility to interpersonal influence, their need for cognition, their self-confidence and their product knowledge. Consumers' product knowledge also influenced their perceived risk, which did not affect their preference for interpersonal search significantly. Copyright © 2005 John Wiley & Sons, Ltd. [source] Making the Best of a Bad Situation: Material Resources and Teenage ParenthoodJOURNAL OF MARRIAGE AND FAMILY, Issue 1 2007Stefanie Mollborn Past research has largely ignored the influence of material resources on teenage parents' life outcomes. A lack of resources such as housing, child care, and financial support is hypothesized to explain the negative effect of teenage parenthood on educational attainment. Regression analyses use nationally representative data from the 1988 , 2000 National Education Longitudinal Study (N = 8,432, n = 356 teenage parents). Results support the hypothesis completely for the teenage fathers in the sample and partially for mothers: Resources substantially diminish the educational penalty teenage parents paid by age 26. Gender influences which types of resources are protective, providing policy implications. Help with child care is critical for teenage mothers, whereas housing and financial resources may be important for men. [source] Economic hardship in the family of origin and children's psychological well-Being in adulthoodJOURNAL OF MARRIAGE AND FAMILY, Issue 1 2005Juliana M. Sobolewski Past research consistently indicates that poverty and economic hardship have negative consequences for children. Few studies, however, have examined whether these consequences persist into adulthood. This study addresses this gap by assessing whether economic resources in the family of origin have long-term effects on psychological well-being in adulthood. Specifically, we test two processes,one involving interpersonal processes in the family of origin, and the other involving children's socioeconomic attainment,that may help to explain the link between early economic factors and later well-being. Using 17-year longitudinal data from two generations (N= 589), we find evidence that economic hardship in the family of origin predicts later adult well-being through the parents' marital relationship, the parent-teen relationship, children's educational attainment, and children's earned income. Supplementary analyses suggest that economic hardship is particularly problematic when it is of long duration or when it occurs during adolescence. [source] Paternal Involvement with Children: The Influence of Gender IdeologiesJOURNAL OF MARRIAGE AND FAMILY, Issue 1 2004Ronald E. Bulanda Although prior social science research has established the ability of gender ideologies to influence the domestic division of labor, it has neglected to disentangle their potentially unique influence on paternal involvement with children. Past research examining the influence of gender ideology on parenting behaviors does not acknowledge potential differences that may result from accounting for each parent's gender ideology. Using both waves of the National Survey of Families and Households (N = 1,088), I assess the effect of both mother's and father's gender ideology on two measures of paternal involvement. Whereas egalitarian fathers demonstrate greater involvement than traditional fathers, mother's gender ideology failed to predict paternal involvement. Egalitarian mothers do not appear to negotiate greater father involvement successfully. [source] Intergenerational Transmission of Constructive ParentingJOURNAL OF MARRIAGE AND FAMILY, Issue 1 2001Zeng-yin Chen Past research on the intergenerational transmission of parenting concentrates on the continuity of harsh or abusive parenting, for the most part relying on retrospective reports of early upbringing. This study investigates the intergenerational transmission of constructive parenting using a 3-wave longitudinal data set that has spanned 2 decades, obtaining the respondents' contemporaneous reports in early adolescence, early adulthood, and middle adulthood respectively (N= 2,338). The results support the hypotheses that interpersonal relations, social participation, and role-specific modeling explain the intergenerational continuity of constructive parenting. [source] Spatial risk assessment for extreme river flowsJOURNAL OF THE ROYAL STATISTICAL SOCIETY: SERIES C (APPLIED STATISTICS), Issue 5 2009Caroline Keef Summary., The UK has in recent years experienced a series of fluvial flooding events which have simultaneously affected communities over different parts of the country. For the co-ordination of flood mitigation activities and for the insurance and reinsurance industries, knowledge of the spatial characteristics of fluvial flooding is important. Past research into the spatiotemporal risk of fluvial flooding has largely been restricted to empirical estimates of risk measures. A weakness with such an approach is that there is no basis for extrapolation of these estimates to rarer events, which is required as empirical evidence suggests that larger events tend to be more localized in space. We adopt a model-based approach using the methods of Heffernan and Tawn. However, the large proportion of missing data over a network of sites makes direct application of this method highly inefficient. We therefore propose an extension of the Heffernan and Tawn method which accounts for missing values. Furthermore, as the risk measures are spatiotemporal an extension of the Heffernan and Tawn method is also required to handle temporal dependence. We illustrate the benefits of the procedure with a simulation study and by assessing spatial dependence over four fluvial sites in Scotland. [source] Prisoners' Adjustment, Correctional Officers, and Context: The Foreground and Background of Punishment in Late ModernityLAW & SOCIETY REVIEW, Issue 2 2008Mike Vuolo Past research indicates that front-line criminal justice workers are the critical players in determining whether innovations in penal policy are realized. Recent attempts to understand the diversity in the application of the penal harm movement have, however, sidestepped the primary audience of these policies, the population of convicted offenders. This article uses data from two prisons to examine the effects of correctional officers on women prisoners' adjustment to prison life. Using regression models and interview data, we find that correctional officer behavior has a profound impact on women's ability to adjust to prison, and this effect is largely independent of the prisoners' characteristics and the institutions in which they are housed. On a theoretical level, the findings speak to recent calls to examine the background and foreground of penal culture. On a practical level, they highlight the need to understand the environments from which women are emerging, not just the communities into which they are released. [source] The Psychosocial and Behavioral Characteristics Related to Energy MisreportingNUTRITION REVIEWS, Issue 2 2006Jaclyn Maurer PhD Energy underreporting occurs in 2% to 85% and overreporting in 1% to 39% of various populations. Efforts are needed to understand the psychosocial and behavioral characteristics associated with misreporting to help improve the accuracy of dietary self-reporting. Past research suggests that higher social desirability and greater eating restraint are key factors influencing misreporting, while a history of dieting and being overweight are more moderately associated. Eating disinhibition, body image, depression, anxiety, and fear of negative evaluation may be related to energy misreporting, but evidence is insufficient. This review will provide a detailed discussion of the published associations among psychosocial and behavioral characteristics and energy misreporting. [source] Behavior and quality of life measures after anesthesia for tonsillectomy or ear tube insertion in childrenPEDIATRIC ANESTHESIA, Issue 10 2010KELLY HOWARD BSc (HONS) Summary Background:, Past research examining the psychosocial impact of general anesthesia and day case surgery on children has been hampered by a lack of valid and reliable assessment tools. Aim:, The purpose of the current study was to assess the feasibility of using a well-validated scale (i.e. the Pediatric Quality of Life Inventory Generic Core Scales Version 4.0, PedsQL) in the perioperative setting and to establish changes seen in a sample of children having day case surgery when using this scale. Method:, Eighty-nine children (aged 3,12 years) scheduled for general anesthesia for day case tonsillectomy or ear tube insertions were recruited into a prospective study in Melbourne, Australia. Parents completed the PedsQL and the Post Hospitalization Behavioral Questionnaire (PHBQ), and children completed the PedsQL (child self-report) at baseline (preanesthesia), 7 days following anesthesia and 30 days following anesthesia. Results:, The response rate at day 7 and day 30 was modest but when returned the PedsQL and PHBQ had minimal missing data. On the PedsQL, parents rated children's physical functioning as worse at day 7 than at baseline but psychosocial functioning did not differ significantly from baseline. At 30 days, both physical and psychosocial functioning was rated by parents to be better than baseline levels. From children's perspective, there was little evidence of a change in their physical or psychosocial functioning on the self-report PedsQL at day 7, but by day 30 both physical and psychosocial functioning was above baseline levels. A similar pattern was observed on the PHBQ, with little difference in ratings of behavioral problems between baseline and day 7, but less behavioral problems reported at day 30 compared with baseline. Conclusions:, The PedsQL is feasible for use in the perioperative setting. Future studies should take into account the possibility that deterioration of psychosocial functioning is uncommon at 1 -month postsurgery compared to the preoperative baseline. [source] Allelopathy in crop/weed interactions , an updatePEST MANAGEMENT SCIENCE (FORMERLY: PESTICIDE SCIENCE), Issue 4 2007Regina G Belz Abstract Since varietal differences in allelopathy of crops against weeds were discovered in the 1970s, much research has documented the potential that allelopathic crops offer for integrated weed management with substantially reduced herbicide rates. Research groups worldwide have identified several crop species possessing potent allelopathic interference mediated by root exudation of allelochemicals. Rice, wheat, barley and sorghum have attracted most attention. Past research focused on germplasm screening for elite allelopathic cultivars and the identification of the allelochemicals involved. Based on this, traditional breeding efforts were initiated in rice and wheat to breed agronomically acceptable, weed-suppressive cultivars with improved allelopathic interference. Promising suppressive crosses are under investigation. Molecular approaches have elucidated the genetics of allelopathy by QTL mapping which associated the trait in rice and wheat with several chromosomes and suggested the involvement of several allelochemicals. Potentially important compounds that are constitutively secreted from roots have been identified in all crop species under investigation. Biosynthesis and exudation of these metabolites follow a distinct temporal pattern and can be induced by biotic and abiotic factors. The current state of knowledge suggests that allelopathy involves fluctuating mixtures of allelochemicals and their metabolites as regulated by genotype and developmental stage of the producing plant, environment, cultivation and signalling effects, as well as the chemical or microbial turnover of compounds in the rhizosphere. Functional genomics is being applied to identify genes involved in biosynthesis of several identified allelochemicals, providing the potential to improve allelopathy by molecular breeding. The dynamics of crop allelopathy, inducible processes and plant signalling is gaining growing attention; however, future research should also consider allelochemical release mechanisms, persistence, selectivity and modes of action, as well as consequences of improved crop allelopathy on plant physiology, the environment and management strategies. Creation of weed-suppressive cultivars with improved allelopathic interference is still a challenge, but traditional breeding or biotechnology should pave the way. Copyright © 2006 Society of Chemical Industry [source] Civic Knowledge of High School Students in Israel: Personal and Contextual DeterminantsPOLITICAL PSYCHOLOGY, Issue 4 2007Professor Orit Ichilov Past research on civic education suggests that students' performance is largely influenced by individual socioeconomic background and motivational factors. There has been little attention to the effects of school and classroom ideological and social attributes, such as the socioeconomic make-up of the school or classroom, or how interested in politics are a student's classmates. The results of the present study support the contention that contextual effects play a vital role in determining students' civic knowledge scores. Analysis of Israeli 11th graders' performance on the International Association for the Evaluation of Educational Achievement (IEA) civic knowledge test shows that while individual backgrounds and motivations play a significant role, school and classroom contexts greatly contribute to civic knowledge acquisition. [source] Compassionate Politics: Support for Old-Age Programs Among the Non ElderlyPOLITICAL PSYCHOLOGY, Issue 3 2001Leonie Huddy This study examines the existence of compassionate support for old-age programs such as Social Security and Medicare among the non-elderly. Past research has focused on merit and equality as a basis for support of social welfare programs by examining views of recipients' deservingness; in contrast, this study considers the extent of program support based on recipients' perceived need. Analysis of data from the 1984 National Election Study and from a local survey (Suffolk County, New York, 1989) shows that non-elderly individuals who view older people as financially impoverished are more likely to support government benefits for the aged. Moreover, compassionate support for old-age programs is distinct from liberal ideology; indeed, political conservatives, not liberals, are most likely to support such programs out of compassion for older people, a finding at odds with Sniderman's (Sniderman & Carmines, 1997) notion of principled conservatism. The analysis also revealed that response to elderly need does not convey the effects of long-term and family-based interests; this result substantiates that support of old-age programs can be considered as other-regarding (i.e., reflecting a concern for individuals that is unrelated to one's personal circumstances). Short-term and long-term interests tend to eclipse rather than promote compassionate support of old-age programs, consistent with the findings of traditional research on self-interest. [source] A dual-sequence framework for B2C relationship formation: Moderating effects of employee communication style in online group chatPSYCHOLOGY & MARKETING, Issue 2 2009Pratibha A. Dabholkar Past research on B2C relationships has typically focused on unidimensional constructs of satisfaction, trust, and commitment, ignoring underlying psychological dimensions. Although some studies have examined cognitive and affective dimensions of these relational constructs, dual sequential effects in relationship formation have not been investigated. This study proposes and finds (in the context of online group chat) that parallel cognitive and affective sequences of relationship formation take place, thus expanding scholarly understanding of underlying psychological processes and offering marketing practitioners two different ways to build relationships with consumers. The proposed dual-sequence relational framework further advances theory by shedding light on counterintuitive findings in past research. The study also supports the proposed moderating effects of employee communication style, such that sequential effects of cognitive (affective) relational constructs are stronger with a task-oriented (socially oriented) employee, thus offering insights to practitioners in hiring and training employees to match specific organizational goals for building relationships with consumers. © 2009 Wiley Periodicals, Inc. [source] The effects of optimal time of day on persuasion processes in older adultsPSYCHOLOGY & MARKETING, Issue 5 2007Carolyn Yoon Past research demonstrates that the majority of older adults (60 years and older) perform resource-demanding tasks better in the morning than in the afternoon or evening. The authors ask whether this time-of-day effect also impacts persuasion processes performed under relatively high involvement. The data show that the attitudes of older adults are more strongly affected by an easy-to-process criterion, picturerelatedness, at their non-optimal time of day (afternoon) and by a more-difficult-to-process criterion, argument strength, at their optimal time of day (morning). In contrast, the attitudes of younger adults are affected primarily by argument strength at both their optimal (afternoon) and non-optimal (morning) times of day. Process-level evidence that accords with these results is provided. The results accentuate the need for matching marketing communications to the processing styles and abilities of older adults. © 2007 Wiley Periodicals, Inc. [source] The Electoral Costs of Party Loyalty in CongressAMERICAN JOURNAL OF POLITICAL SCIENCE, Issue 3 2010Jamie L. Carson To what extent is party loyalty a liability for incumbent legislators? Past research on legislative voting and elections suggests that voters punish members who are ideologically "out of step" with their districts. In seeking to move beyond the emphasis in the literature on the effects of ideological extremity on legislative vote share, we examine how partisan loyalty can adversely affect legislators' electoral fortunes. Specifically, we estimate the effects of each legislator's party unity,the tendency of a member to vote with his or her party on salient issues that divide the two major parties,on vote margin when running for reelection. Our results suggest that party loyalty on divisive votes can indeed be a liability for incumbent House members. In fact, we find that voters are not punishing elected representatives for being too ideological; they are punishing them for being too partisan. [source] Simulated reflux decreases vocal fold epithelial barrier resistance,,THE LARYNGOSCOPE, Issue 8 2010CF-SLP, Elizabeth Erickson MS Abstract Objectives/Hypothesis: The vocal fold epithelium provides a barrier to the entry of inhaled and systemic challenges. However, the location of the epithelium makes it vulnerable to damage. Past research suggests, but does not directly demonstrate, that exposure to gastric reflux adversely affects the function of the epithelial barrier. Understanding the nature of reflux-induced epithelial barrier dysfunction is necessary to better recognize the mechanisms for vocal fold susceptibility to this disease. Therefore, we examined the effects of physiologically relevant reflux challenges on vocal fold transepithelial resistance and gross epithelial and subepithelial appearance. Study Design: Ex vivo, mixed design with between-group and repeated-measures analyses. Methods: Healthy, native porcine vocal folds (N = 52) were exposed to physiologically relevant acidic pepsin, acid-only, or pepsin-only challenges and examined with electrophysiology and light microscopy. For all challenges, vocal folds exposed to a neutral pH served as control. Results: Acidic pepsin and acid-only challenges, but not pepsin-only or control challenges significantly reduced transepithelial resistance within 30 minutes. Reductions in transepithelial resistance were irreversible. Challenge exposure produced minimal gross changes in vocal fold epithelial or subepithelial appearance as evidenced by light microscopy. Conclusions: These findings demonstrate that acidic environments characteristic of gastric reflux compromise epithelial barrier function without gross structural changes. In healthy, native vocal folds, reductions in transepithelial resistance could reflect reflux-related epithelial disruption. These results might guide the development of pharmacologic and therapeutic recommendations for patients with reflux, such as continued acid-suppression therapy and patient antireflux behavioral education. Laryngoscope, 2010 [source] Events that have become central to identity: Gender differences in the centrality of events scale for positive and negative eventsAPPLIED COGNITIVE PSYCHOLOGY, Issue 1 2010Adriel Boals Past research has demonstrated that the extent to which a negative event has become central to one's identity using the centrality of events scale (CES) is associated with depression, dissociation and PTSD symptoms. The combined results from two studies that collectively examined nominated negative and positive personal events and the 2004 Presidential election found that females are more likely than males to construct a negative event as central to their identity. In addition, higher CES scores for a negative event were associated with higher ratings of vividness, emotional intensity, visceral emotional reactions, depression, dissociation, PTSD symptoms and worse physical health outcomes. In contrast, CES scores for positive events were not related to the measures of mental or physical health, although this finding was ambiguous in Study 2. The tendency for females to construct a negative event as central to their identity may help explain gender differences in mental health outcomes. Copyright © 2009 John Wiley & Sons, Ltd. [source] Which should you use, intuition or logic?ASIAN JOURNAL OF SOCIAL PSYCHOLOGY, Issue 4 2008Cultural differences in injunctive norms about reasoning Past research has shown that tendencies to engage in holistic and analytical reasoning are differentially encouraged by East Asian and Western cultures. But little is known about cultural differences in the perceived value of analytic versus intuitive reasoning. In Study 1, Koreans and Americans ranked the importance of traits including ,intuitive' and ,logical' in work and family contexts. In Study 2, Euro-Canadians and East-Asian-Canadians read scenarios of intuitive versus rule-following business decisions. Relative to Western participants, East Asians rated intuitive reasoning as more important and reasonable than analytic reasoning. Implications for the epistemic status of reasoning modes, culture's effect on values about reasoning, and multiculturalism are discussed. [source] | |||||||||||||||||||||||||||||||||||||||||||