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Equation Modelling (equation + modelling)
Kinds of Equation Modelling Terms modified by Equation Modelling Selected AbstractsDependence of broad-scale geographical variation in fleshy-fruited plant species richness on disperser bird species richnessGLOBAL ECOLOGY, Issue 4 2004Ana L. Márquez ABSTRACT Aim, We analysed the interdependence of avian frugivore- and fruited plant-species richness at the scale of major river basins across Europe, taking into account several environmental factors along different spatial gradients. Location, Continental Europe and the British Isles. Methods, We focused on wintering birds and autumn/winter fruiting plants, and used major river basins as geographical units and Structural Equation Modelling as the principal analytical tool. Results, The statistical influence of disperser species richness on fleshy-fruited plant species richness is roughly double that of the reverse. Broad-scale variation in frugivore richness is more dependent on environmental factors than on fruited plant richness. However, the influence of disperser richness on plant richness is four times higher than the influence of environmental factors. Environmental influences on both birds and plants are greater than purely spatial influences. Main conclusions, Our results are interpreted as indicating that biotic dispersal of fruits strongly affects broad-scale geographical trends of fleshy-fruited plant species richness, whereas richness of fruited plants moderately affects frugivore richness. [source] To go or stay home and watch: exploring the balance between motives and perceived constraints for major events: a case study of the 2008 Beijing Olympic GamesINTERNATIONAL JOURNAL OF TOURISM RESEARCH, Issue 1 2009Daniel C. Funk Abstract The current study offers insight into the role of motivation and constraints on behavioural intentions prior to a mega event. The Psychological Continuum Model framework was used to integrate motivation and leisure constraints theory to examine attraction towards the 2008 Olympic Games. Semi-structured interviews (N = 47) and a questionnaire (N = 235) distributed in Australia and the USA were used to identify and measure three motivational themes: cultural learning, cultural experience and olympic event interest, and three perceived constraints: structural, interpersonal and intrapersonal. Structural Equation Modelling revealed that motives were positively related to behavioural intentions while constraints were negatively related. Analysis further revealed the interaction between motives and perceived constraints led to two different forms of behavioural intentions; intentions to travel and attend the event vs. stay home to watch the event on TV. Policy and marketing implications are discussed that illustrate the benefits of understanding both motives and perceived constraints for tourism travel. Copyright © 2008 John Wiley and Sons, Ltd. [source] Efficacy beliefs predict collaborative practice among intensive care unit nursesJOURNAL OF ADVANCED NURSING, Issue 3 2010Pascale M. Le Blanc le blanc p.m., schaufeli w.b., salanova m., llorens s. & nap r.e. (2010) Efficacy beliefs predict collaborative practice among intensive care unit nurses. Journal of Advanced Nursing66(3), 583,594. Abstract Aim., This paper is a report of an investigation of whether intensive care nurses' efficacy beliefs predict future collaborative practice, and to test the potential mediating role of team commitment in this relationship. Background., Recent empirical studies in the field of work and organizational psychology have demonstrated that (professional) efficacy beliefs are reciprocally related to workers' resources and well-being over time, resulting in a positive gain spiral. Moreover, there is ample evidence that workers' affective commitment to their organization or work-team is related to desirable work behaviours such as citizenship behaviour. Methods., A longitudinal design was applied to questionnaire data from the EURICUS-project. Structural Equation Modelling was used to analyse the data. The sample consisted of 372 nurses working in 29 different European intensive care units. Data were collected in 1997 and 1998. However, our research model deals with fundamental psychosocial processes that are not time-dependent. Moreover, recent empirical literature shows that there is still room for improvement in ICU collaborative practice. Results., The hypotheses that (i) the relationship between efficacy beliefs and collaborative practice is mediated by team commitment and (ii) efficacy beliefs, team commitment and collaborative practice are reciprocally related were supported, suggesting a potential positive gain spiral of efficacy beliefs. Conclusion., Healthcare organizations should create working environments that provide intensive care unit nurses with sufficient resources to perform their job well. Further research is needed to design and evaluate interventions for the enhancement of collaborative practice in intensive care units. [source] Mediator effects in the social development model: an examination of constituent theoriesCRIMINAL BEHAVIOUR AND MENTAL HEALTH, Issue 4 2005Eric C. Brown Background The social development model (SDM) provides an explanatory framework for the progression of antisocial behaviour in children and adolescents. Although previous research has assessed the predictive validity of the model, alternative associations based on the SDM's constituent theories have not been examined. Method Using structural equation modelling, a series of direct paths was examined for mediation by SDM constructs. Data for the study consisted of teacher-, parent- and self-report of 1016 fourth- and fifth-grade students from the Raising Healthy Children project, a longitudinal etiological study with an embedded preventive intervention. Results Four of the seven paths examined were partially or totally mediated by SDM constructs. Specifically, the relationship between prosocial bonding and adolescent antisocial behaviour, as hypothesized by social control theory, was fully mediated by prosocial beliefs. As hypothesized by social learning theory, students' socioemotional and cognitive skills significantly predicted antisocial behaviour, independent of partial mediation through rewards, bonding and beliefs. As hypothesized by differential association theory, involvement with both prosocial and antisocial persons was directly associated with respective prosocial and antisocial beliefs, independent of partial mediation through rewards and bonding. Conclusions These findings suggest additional associations that are not currently specified in the SDM and underscore the importance of re-examining hypotheses from constituent theories when integrating developmental models of antisocial behaviour. Copyright © 2005 John Wiley & Sons, Ltd. [source] How does early developmental assessment predict academic and attentional,behavioural skills at group and individual levels?DEVELOPMENTAL MEDICINE & CHILD NEUROLOGY, Issue 10 2009RIITTA VALTONEN LICPSYCH The main aim of the study was to explore the ability of a brief developmental assessment to predict teacher-rated learning and attentional and behavioural skills in the first grade of school at both the group and individual levels. A sample of 394 children (181 males, 213 females) aged 4 years were followed to the age of 6 years, and 283 of the children (145 males, 138 females; mean age 7y 11 mo) were followed further to the first grade (age 7y) at school. The children were administered a brief but comprehensive developmental assessment (Lene , a neurodevelopmental screening method) at their local child health-care centres at ages 4 and 6 years. In the first grade, teachers completed a detailed questionnaire (JLD Teacher Questionnaire) on the children's (mean age 7y 11mo, SD 3.1mo, range 7y 3mo,8y 4mo) performance and behaviour. Structural equation modelling showed that no single developmental area predicted development during the follow-up. Instead, a comprehensive developmental outcome at age 4 years significantly predicted skills in the first grade at the group level. Developmental status at age 4 and 6 years together explained 66% of the variance of academic skills and 40% of the variance of attentional and behavioural skills in the first grade. Age-specific logistic regression analyses were constructed to produce the risk indices. At the individual level it was possible to reach acceptable levels of sensitivity and specificity for academic skills at age 4 and age 6 years. Identification of attentional and behavioural problems at the individual level was possible at age 6 years, but the number of false positives was high. [source] Anthropogenic impacts upon plant species richness and net primary productivity in CaliforniaECOLOGY LETTERS, Issue 2 2005John W. Williams Abstract We assess the importance of anthropogenic land-use, altered productivity, and species invasions for observed productivity,richness relationships in California. To this end, we model net primary productivity (NPP) c. 1750 AD and at present (1982,1999) and map native and exotic vascular plant richness for 230 subecoregions. NPP has increased up to 105% in semi-arid areas and decreased up to 48% in coastal urbanized areas. Exotic invasions have increased local species diversity up to 15%. Human activities have reinforced historical gradients in species richness but reduced the spatial heterogeneity of NPP. Structural equation modelling suggests that, prior to European settlement, NPP and richness were primarily controlled by precipitation and other abiotic variables, with NPP mediating richness. Abiotic variables remain the strongest predictors of present NPP and richness, but intermodel comparisons indicate a significant anthropogenic impact upon statewide distributions of NPP and richness. Exotic and native species each positively correlate to NPP after controlling for other variables, which may help explain recent reports of positively associated native and exotic richness. [source] Do smoking attitudes predict behaviour?ADDICTION, Issue 10 2008A longitudinal study on the bi-directional relations between adolescents' smoking attitudes, behaviours ABSTRACT Aims Prevention and intervention programmes focus frequently upon retaining or creating negative attitudes towards smoking in an effort to prevent adolescents from smoking. As the focus upon attitudes is central in these programmes it is essential to know whether smoking attitudes actually precede smoking behaviour or, conversely, are affected by it. Therefore, in the present study we examined to what extent bi-directional relations existed between smoking attitudes and behaviour. Design Data were used from the three annual waves of the ,Family and Health' project. Setting Participants were asked to complete questionnaires individually at their homes. Participants Addresses of families consisting of two parents and two adolescents were obtained from the records of 22 municipalities in the Netherlands. At baseline, 428 families participated with a response rate of 94% at the third measurement. Measurements Self-reports were used to assess adolescents' smoking attitudes and behaviour. Associations between smoking attitudes and behaviour were tested using structural equation modelling. Findings Findings revealed that smoking attitudes did not predict smoking consistently over time. However, past smoking affected subsequent attitudes moderately, suggesting that adolescents who started to smoke developed less negative attitudes towards smoking. Conclusions The current findings imply that smoking behaviour predominantly shapes smoking-related attitudes, rather than vice versa. Focusing merely on smoking attitudes is probably not enough to prevent adolescents from smoking. [source] Alcohol-specific rules, personality and adolescents' alcohol use: a longitudinal person,environment studyADDICTION, Issue 7 2007Haske Van Der Vorst ABSTRACT Aims To examine the bi-directional associations between providing alcohol-specific rules and adolescents' alcohol use. Further, to explore person,environment interactions, we tested whether Big Five personality traits moderate the assumed association between providing alcohol-specific rules and adolescents' alcohol use. Design Longitudinal data (three waves in 2 years) from 428 families, consisting of both parents and two adolescents (aged 13,16 years) were used for the analyses. Analyses were conducted on four samples: a group of older adolescents and a group of younger adolescents who already consumed alcohol, and a group of older and younger adolescents who were not drinking at baseline measurement. Findings In general, results of structural equation modelling showed that providing clear alcohol-specific rules lowers the likelihood of drinking initiation, regardless of the age of the youngsters. Once adolescents have established a drinking pattern, the impact of parental alcohol-specific rules declined or even disappeared. Finally, the Big Five personality traits did not moderate the association between providing alcohol-specific rules and adolescents' alcohol involvement. Conclusions In sum, in particular during the initiation phase of drinking, parents could prevent the drinking of their offspring, regardless of the age or personality of their youngsters, by providing clear alcohol-specific rules. [source] Childhood social disadvantage and smoking in adulthood: results of a 25-year longitudinal studyADDICTION, Issue 3 2007David M. Fergusson ABSTRACT Aim To examine the associations between exposure to socio-economic disadvantage in childhood and smoking in adulthood. Design A 25-year longitudinal study of the health, development and adjustment of a birth cohort of 1265 New Zealand children. Measurements Assessments of childhood socio-economic disadvantage, smoking in adulthood and potential mediating pathways, including: parental education, family socio-economic status, family living standards and family income; smoking frequency and nicotine dependence at age 25 years; child IQ, educational achievement by age 18 years, conduct problems ages 14,16 years, parental smoking 0,16 years and peer smoking at 16 years. Findings Smoking at age 25 was correlated significantly (P < 0.0001) with increasing childhood socio-economic disadvantage. Further, indicators of childhood socio-economic disadvantage were correlated significantly (P < 0.0001) with the intervening variables of childhood intelligence, school achievement, conduct problems and exposure to parental and peer smoking; which in turn were correlated significantly (P < 0.0001) with measures of smoking at age 25. Structural equation modelling suggested that the linkages between the latent factor of childhood disadvantage and later smoking were explained largely by a series of pathways involving cognitive/educational factors, adolescent behavioural adjustment and exposure to parental and peer smoking. Conclusions The current study suggested that smoking in adulthood is influenced by childhood socio-economic disadvantage via the mediating pathways of cognitive/educational factors, adolescent behaviour and parental and peer smoking. [source] Tests of causal linkages between cannabis use and psychotic symptomsADDICTION, Issue 3 2005David M. Fergusson ABSTRACT Aim To examine possible causal linkages between cannabis use and psychosis using data gathered over the course of a 25-year longitudinal study. Design A 25-year longitudinal study of the health, development and adjustment of a birth cohort of 1265 New Zealand children (635 males, 630 females). Setting The Christchurch Health and Development Study, a general community sample. Participants A total of 1055 participants from the Christchurch Health and Development Study (CHDS) cohort for whom data on cannabis use and psychotic symptoms were available on at least one occasion from 18, 21 and 25 years. Measurements As part of this study, data were gathered on frequency of cannabis use and psychotic symptoms at ages 18, 21 and 25 years. Findings Regression models adjusting for observed and non-observed confounding suggested that daily users of cannabis had rates of psychotic symptoms that were between 1.6 and 1.8 times higher (P < 0.001) than non-users of cannabis. Structural equation modelling suggested that these associations reflected the effects of cannabis use on symptom levels rather than the effects of symptom levels on cannabis use. Conclusions The results of the present study add to a growing body of evidence suggesting that regular cannabis use may increase risks of psychosis. The present study suggests that: (a) the association between cannabis use and psychotic symptoms is unlikely to be due to confounding factors; and (b) the direction of causality is from cannabis use to psychotic symptoms. [source] An application of escape theory to binge eatingEUROPEAN EATING DISORDERS REVIEW, Issue 1 2006Sonja Blackburn Abstract The application of Escape Theory (Heatherton & Baumeister, 1991) to binge eating was studied in a non-clinical sample of 129 women. Structural equation modelling (SEM) showed a good fit between the Escape Model and the data. Perfectionism strongly predicted aversive self-awareness which, in turn, predicted negative affect. Negative affect predicted levels of avoidant coping which strongly predicted levels of binge eating. Implications for understanding and treating binge eating are considered. Copyright © 2006 John Wiley & Sons, Ltd and Eating Disorders Association. [source] Changes of effective connectivity between the lateral and medial parts of the prefrontal cortex during a visual taskEUROPEAN JOURNAL OF NEUROSCIENCE, Issue 3 2003Thierry Chaminade Abstract Structural equation modelling was used to study the change of connectivity during a visual task with continuous variation of the attention load. The model was based on areas defined by the haemodynamic responses described elsewhere [Mazoyer, P., Wicker, B. & Fonlupt, P. (2002) A neural network elicited by parametric manipulation of the attention load. Neuroreport, 13, 2331,2334], including occipitotemporal, parietal, temporal and prefrontal (lateral and medial areas) cortices. We have studied stationary- (which does not depend on the attentional load) and attention-related coupling between areas. This allowed the segregation of two subsystems. The first could reflect a system performing the integration step of the visual signal and the second a system participating in response selection. The major finding is the mutual negative influence between the lateral and medial parts of the prefrontal cortex. This negative influence between these two brain regions increased with the attention load. This is interpreted as a modification of the balance between integration and decision processes that are needed for the task to be efficiently completed. [source] Conscientiousness and achievement motivation predict performanceEUROPEAN JOURNAL OF PERSONALITY, Issue 7 2009Michelle Richardson Abstract A prospective survey was conducted to identify predictors of university students' grade point average (GPA) using separate samples of female (N,=,472) and male (N,=,142) students over 9 months. Big five personality traits and achievement motivation were measured. Correlations show that conscientiousness (C) and achievement motivation explained variation in GPA. Latent variable structural equation modelling showed that the effect of C on GPA is fully mediated by achievement motivation for both female and male students. Invariant factor and structural mediation models across the female and male groups are also reported. Finally, the mediation model is shown to remain significant after scholastic achievement is controlled. The findings are interpreted within the framework of Neo-Socioanalytic theory. Copyright © 2009 John Wiley & Sons, Ltd. [source] The Distressed personality type: replicability and general health associationsEUROPEAN JOURNAL OF PERSONALITY, Issue 7 2007Benjamin P. Chapman Abstract The Distressed personality type, identified in a cardiac population, confers risk for worse cardiac outcomes. Whether such a class of persons is identifiable in general patient populations, as well as its health correlates, remains unknown. We investigated these questions in a sample of 482 older primary care patients. Mixture structural equation modelling revealed that a Distressed Type was identifiable in Five Factor Model (FFM) personality data and associated with higher levels of medically documented multimorbidity, and worse subjective health ratings, physician assessed physical functioning and interviewer rated psychosocial functioning. In models including paths from outcomes to both traits and types, traits and types were independently associated with health outcomes, pointing towards the value of considering both approaches in epidemiologic personology research. Copyright © 2007 John Wiley & Sons, Ltd. [source] Personality, cognition, and university students' examination performanceEUROPEAN JOURNAL OF PERSONALITY, Issue 6 2003Pru Phillips A prospective study explored the relationship between personality traits (as defined by the five factor model), type of motivation (as defined by self-determination theory), and goal-specific cognitions (including those specified by the theory of planned behaviour) as antecedents of degree performance amongst undergraduate students. A sample of 125 students completed a questionnaire two to three months before their final examinations. Structural equation modelling was used to explore relationships. Intention and perceived behavioural control explained 32% of the variance in final degree marks, with intention being the strongest predictor. Controlling for theory of planned behaviour variables, anticipated regret, good-student identity, controlled extrinsic motivation, Conscientiousness, and Openness had direct significant effects on intention. In total, 65% of the variance in intention was explained. The resultant model illustrates how personality traits may affect examination performance by means of mediators such as intention, anticipated regret, student identity, and autonomous intrinsic motivation. Copyright © 2003 John Wiley & Sons, Ltd. [source] Facing guilt: Role of negative affectivity, need for reparation, and fear of punishment in leading to prosocial behaviour and aggressionEUROPEAN JOURNAL OF PERSONALITY, Issue 3 2001Gian Vittorio Caprara The present study aims to further corroborate and to extend the scope of previous findings regarding the path of influence between negative affectivity, need for reparation and fear of punishment when examining the determinants and the motivational components of guilt. Data were collected from three different European countries (i.e. Italy, Hungary, and the Czech Republic). About 1100 young adolescents were involved in the research. The generalizability of a nomological network linking individual differences in Negative Affectivity to Need for Reparation, Fear of Punishment, Prosocial Behaviour, and Aggression has been investigated across countries and gender, by means of structural equation modelling. Need for Reparation turns out to be positively related to Prosocial Behaviour and negatively related to Aggression. Fear for Punishment turns out to be positively related to Aggression and negatively related to Prosocial Behaviour, with the exception of Hungary. Alternative paths of influence among considered variables have been examined. Practical implications for prevention and education are underlined. Copyright © 2001 John Wiley & Sons, Ltd. [source] Ideological beliefs as determinants of discrimination in positive and negative outcome distributionsEUROPEAN JOURNAL OF SOCIAL PSYCHOLOGY, Issue 5 2005Catherine E. Amiot Social identity theory proposes that discrimination contributes favourably to group members' social identity. In minimal group paradigm (MGP) studies involving positive outcome distributions (e.g. money), discrimination is associated with a more positive social identity. But studies on the positive-negative asymmetry effect show that categorization leads to less discrimination when negative (salary cuts) than when positive outcomes (salary increases) are distributed. Using structural equation modelling, this study (N,=,279) tested whether discrimination involving negative outcome distributions could contribute as much to group members' positive social identity as discrimination on positive outcomes. The study also tested if ideological beliefs (i.e. social dominance orientation, authoritarianism), measured one month before the MGP experiment, could predict positive and negative outcome discrimination. While the fit of the hypothesized model was adequate, only social dominance orientation predicted both positive and negative outcome discrimination. Also, discrimination on positive outcomes but not on negative ones contributed to positive social identity. Copyright © 2004 John Wiley & Sons, Ltd. [source] Relationship between post-fire regeneration and leaf economics spectrum in Mediterranean woody speciesFUNCTIONAL ECOLOGY, Issue 1 2009S. Saura-Mas Summary 1Recent work has identified global-scale relationships between key leaf traits (leaf economics spectrum). However, it is important to determine whether this approach can be applied at local scale with smaller subsets of species facing similar environments. Since fire is a key process in Mediterranean shrubland dynamics we analyze whether fire-related life-history traits influence the pattern of correlation between the leaf economic spectrum and leaf moisture traits. 2Using structural equation modelling and exploratory path analysis, we developed alternative models to test how interspecific leaf traits are related to the seasonal variation of water content (leaves and shoots) and to the type of post-fire regeneration of Mediterranean woody species. 3This study demonstrates that for these species seasonal variation in water content and fuel moisture would be better predicted by the presence or absence of a trait describing post-fire seedling establishment than by the leaf economic spectrum traits. However, leaf dry matter content (LDMC) is influenced by both the leaf economic spectrum and the post-fire regenerative type. 4Seeder species (those that recruit via seeds immediately after fire) present lower LDMC and higher relative seasonal variation of relative water content (RWCrsv) than non-seeders. We hypothesize that since seeder species mostly evolved under the Mediterranean climate, they developed a particular strategy of drought tolerance (without causing an effect to the relation between the volume occupied by cytoplasm relative to the volume occupied by cell walls), which is the cause of the observed relation between LDMC and RWCrsv. 5This study suggests that the leaves of Mediterranean woody species would follow the general leaf economics spectrum (Wright et al. 2004) but that specific selective forces, such as disturbance regime, acting at regional scale also play a relevant role to explain leaf traits related to water content. [source] Assessing the longitudinal course of depression and economic integration of south-east Asian refugees: an application of latent growth curve analysisINTERNATIONAL JOURNAL OF METHODS IN PSYCHIATRIC RESEARCH, Issue 4 2002K.A.S. Wickrama Abstract This paper has both methodological and substantive application for mental-health researchers. Methodologically, it presents the latent growth curve (LGC) technique within a structural equation modelling (SEM) framework as a powerful tool to analyse change in depressive symptoms and potential correlates of such changes. The rationale for LGC analysis and subsequent elaboration of this statistical approach are presented. The limitations of traditional analytical methods are also addressed. Substantively, the paper considers socio-contextual factors as correlates of change in symptoms, and examines the dynamic systematic relationship with the degree of economic integration of south-east Asian immigrants in Canada over time. Using the LGC technique, this study also investigated how the longitudinal course of sub-clinical depression places individuals at risk for developing full-blown major depression. The LGC results provided strong evidence for the reciprocal influence between economic integration and subclinical depression of immigrants. The initial level of economic integration negatively influenced the rate of change in subclinical depression whereas the initial level of sub-clinical depression negatively influenced the rate of change in economic integration. Both initial level and the rate of change in subclinical depression placed individuals at risk for full-blown major depression. However, traditional auto-regressive models were not capable of revealing these dynamic associations. Thus, an investigation of within-individual change in symptoms and potential correlates of such changes is necessary to understand the process that results in full-blown mental disorder. Copyright © 2002 Whurr Publishers Ltd. [source] Development and psychometric testing of a new geriatric spiritual well-being scaleINTERNATIONAL JOURNAL OF OLDER PEOPLE NURSING, Issue 3 2008Karen S. Dunn PhD Aims and objectives., Assess the psychometric properties of a new geriatric spiritual well-being scale (GSWS), specifically designed for older adults. Background., Religiosity and spiritual wellness must be measured as two distinct concepts to prevent confounding them as synonymous among atheist and agnostic population. Design., A test,retest survey design was used to estimate the psychometric properties. Methods., A convenience sample of 138 community-dwelling older adults was drawn from the inner city of Detroit. Data were collected using telephone survey interviews. Data analyses included descriptive statistics, structural equation modelling, reliability analyses, and point-biserial correlations. Results., The factorial validity of the proposed model was not supported by the data. Fit indices were ,2 = 185.98, d.f. = 98, P < 0.00, goodness-of-fit index of 0.85, comparative fit index of 0.87 and root mean error of approximation of 0.08, indicating a mediocre fit. Reliability statistics for the subscales ranged from being poor (0.36) to good (0.84) with an acceptable overall scale alpha of 0.76. Participants' performance stability and criterion-related validity were also supported. Conclusions., The GSWS is an age-specific assessment tool that was developed specifically to address a population's cultural diversity. Future research endeavors will be to test the psychometric properties of this scale in culturally diverse older adult populations for further instrument development. Relevance to clinical practice., Nurses need to recognize that agnostics/atheists have spiritual needs that do not include religious beliefs or practices. Thus, assessing patients' religious beliefs and practices prior to assessing spiritual well-being is essential to prevent bias. [source] Understanding participation in e-learning in organizations: a large-scale empirical study of employeesINTERNATIONAL JOURNAL OF TRAINING AND DEVELOPMENT, Issue 3 2010Thomas N. Garavan Much remains unknown in the increasingly important field of e-learning in organizations. Drawing on a large-scale survey of employees (N = 557) who had opportunities to participate in voluntary e-learning activities, the factors influencing participation in e-learning are explored in this empirical paper. It is hypothesized that key variables derived from the theories of planned behaviour and instructional design , general-person characteristics, motivation to learn, general and task-specific self-efficacy, situational barriers and enablers, and instructional design characteristics , will predict participation in e-learning. Using structural equation modelling, we find statistical support for the overall theoretical model proposed. We discuss the implications for practice. [source] The biogeography of avian extinctions on oceanic islands revisitedJOURNAL OF BIOGEOGRAPHY, Issue 8 2009Tim M. Blackburn Abstract A recent paper by Karels et al., ,The biogeography of avian extinctions on oceanic islands' (Journal of Biogeography, 2008, 35, 1106,1111), uses structural equation modelling to assess the causes of the number of island bird species driven extinct in the historical period. Here, we critically assess the conclusions of the paper and argue that it does not provide the new insights into the causes of extinction in island birds that its authors claim. [source] ORIGINAL ARTICLE: The biogeography of avian extinctions on oceanic islandsJOURNAL OF BIOGEOGRAPHY, Issue 6 2008Tim J. Karels Abstract Aim, To test the influences of island area, island isolation, and human-introduced mammalian predators on avian extinctions that have occurred on oceanic islands worldwide. Location, The oceanic islands of the world. Methods, We augmented and re-examined an existing data set for 218 oceanic islands by means of causal modelling using path analysis (a form of structural equation modelling) and a null model. Results, The number of extinctions was not a simple function of the number of bird species on the various islands. Whereas introduced mammalian predators had an influence on the number of extinctions, island area (via indirect influences) and isolation (via direct influences) were equally or more important. Main conclusions, The multiple influences of physical and biotic factors on past extinctions can be revealed through modelling the causal influences of physical attributes of islands on biological characteristics, and the causal influences of both physical and biological characteristics on extinctions. [source] Assessing competency in nursing: a comparison of nurses prepared through degree and diploma programmesJOURNAL OF CLINICAL NURSING, Issue 1 2005Michael Clinton MSc Aims and objectives., The present study aimed to investigate the competencies of qualifiers from three-year degree and three-year diploma courses in England at one, two and three years after qualification. Background., The provision of three-year preregistration nursing degrees in the UK has increased in recent years and in many colleges degrees are offered alongside the existing three-year diploma courses. Yet little is known about the relationship between these different education programmes and the competence of qualifiers. Methods., A cross-sectional survey design was employed to make comparisons of both self-reported and line-manager-rated competencies of graduate and diplomate nurses who had qualified up to three years previously. Instruments., A revised version of the Nursing Competencies Questionnaire was used to measure both overall competence and also eight specific nursing competencies. A shortened version of this scale was also used to assess internal consistency across measures. Two additional competencies, research awareness and policy awareness, were also measured. Results., Structural equation modelling found very little difference in the overall competence and specific competencies of graduates and diplomates. Where differences were found in the self-report data, diplomates scored more highly than graduates in the constructs of planning and social participation; however, these differences became non-significant when background variables were controlled for. Limitations., The findings are interpreted with caution due to the size of differences, the size of some of the samples of respondents and the developmental stage of the instrument used. Conclusions., It does not appear that graduates and diplomates in England differ in their level of competence to any great extent as measured by the Nursing Competencies Questionnaire. Areas of further work are discussed in the light of the findings. Relevance to clinical practice., While this may alleviate concerns about clinical disparities between the two groups, it raises questions about the proposed benefits to nursing of three-year preregistration degrees in terms of quality of care during the first three years of qualification. [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] An interactive education session and follow-up support as a strategy to improve clinicians' goal-writing skills: a randomized controlled trialJOURNAL OF EVALUATION IN CLINICAL PRACTICE, Issue 1 2010Elisabeth Marsland BAppSc(OT)Hons Abstract Background, Recent research indicates that allied health clinicians have difficulty articulating client needs and priorities into specific and measurable goals. As a result, a number of strategies to facilitate improvement in allied health clinicians' goal-setting skills have been recommended in the literature. In order to assist clinicians develop the skills required to set SMART goals, it is necessary that the strategies are rigorously tested. Aim, To determine if a 50-minute education session and 3-month email and telephone support programme improves clinicians' SMART goal-writing skill and accurately predicts improved goal-writing behaviour. Methods, Concealed random allocation of participants (n = 120) into two parallel groups: (1) intervention group received education on writing goals using the SMART Goal Evaluation Method as part of a workshop on outcome measurement and received 3 months of follow-up support (n = 60); and (2) control group attended a workshop on evidence-based practice (n = 60). Results, Education and follow-up support improved clinicians' SMART goal-writing skills at both the 3- and 6-month review (Yates ,2 = 4.324, d.f. = 1, P = 0.0375). Structural equation modelling revealed education and follow-up support is an accurate predictor of SMART goal-setting behaviour change at both 3 months (standardized regression weights = 0.21; P = 0.014) and 6 months (standardized regression weights = 0.19; P = 0.02) post intervention. Changes were modest and developed over a 6-month period. Conclusion, This study provides empirical evidence that a programme of educating clinicians in a standardized method of goal setting and providing follow-up support improves allied health clinicians' SMART goal-writing skills. [source] Perspectives of fathers and mothers of children in early intervention programmes in assessing family quality of lifeJOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 12 2006M. Wang Abstract Background Family quality of life (FQOL), as a family outcome measure of early intervention and other services, has increasingly drawn attention of researchers, policymakers and service providers. Developing an index of family QOL requires a measure suitable for use with multiple family members. The purpose of this study was to test whether mothers and fathers similarly view the conceptual model of FQOL embodied in one measure. Method This study involved fathers and mothers of 107 families who have a young child (birth to five) with a disability enrolled in an early intervention programme. Data from couples completing the Beach Center FQOL measure were analysed using structural equation modelling (SEM) to determine similarities or differences between fathers and mothers with respect to their assessment of FQOL. Results The analysis of measurement invariance of the FQOL construct across the father and mother groups indicates that the Beach Center FQOL Scale measures equally the underlying FQOL construct across fathers and mothers in this sample. Fathers do not differ from mothers in perceived importance of factors related to FQOL items, nor did they differ in their overall satisfaction with FQOL. Conclusion These results suggest that fathers and mothers respond similarly to the latent constructs within the Beach Center FQOL Scale; therefore, it holds promise for use with both fathers and mothers in assessing FQOL across multiple family members. Further implications for research and practice are discussed. [source] Empowerment in parents of school-aged children with and without developmental disabilitiesJOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 12 2005J. S. Nachshen Abstract Background Despite the widespread use of the term ,empowerment' in clinical literature to describe both a desirable process and the outcome of service delivery, the term remains more of a theoretical than practical construct. This study examined the factors that contribute to empowerment in parents of school-aged children with and without developmental disabilities (DD) using the Double ABCX model of family adaptation contrasted with the linear ACBX model. Methods Parents of children with (n = 100, 97% mothers) and without (n = 100, 98% mothers) DD completed questionnaires relating to child behaviour problems, parent stress and well-being, and formal and informal support. Structural equation modelling was used Results Parents of children with DD reported more child behaviour problems, more stress, less well-being and more social support than parents of children without DD. Structural equation modelling supported the ACBX model for both groups. A linear relationship was found in which parent well-being and resources mediated the relationship between the stressor (child behaviour problems) and the outcome (empowerment). Conclusions The results of the current study support Hastings and Taunt's assertion in 2002, in that empowerment was adequately explained using a traditional model of family functioning. The significant prediction offered by the parent's resources points to the need to deliver services in a manner that is more family-centred. In the education system, this means providing parents with clear messages regarding the schools goals, clarifying the parent's rights and responsibilities, including the parent in planning and decision making, respecting their knowledge as caregivers and supporting their hopes for their child. [source] Market Orientation, Generative Learning, Innovation Strategy and Business Performance Inter-Relationships in Bioscience FirmsJOURNAL OF MANAGEMENT STUDIES, Issue 8 2008Robert E. Morgan abstract We propose conceptual arguments to establish relationships between market orientation and generative learning and their respective impact on exploitative innovation strategy and explorative innovation strategy. We then consider the ambidextrous association between both forms of innovation strategy and business performance. This model is subject to an empirical test using data generated from 160 bioscience firms. Using structural equation modelling, two mutually exclusive paths are specified where market orientation leads to exploitative innovation strategy, while generative learning leads to explorative innovation strategy. We then find that the ambidexterity exhibited by firms in the form of exploitative innovation strategy and explorative innovation strategy significantly explains improvements in firms' business performance. Discussion is given to these findings and managerial implications are presented along with avenues for further research. [source] Job-search preparedness as a mediator of the effects of the Työhön Job Search Intervention on re-employment and mental healthJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 3 2005Jukka Vuori Previous studies that have demonstrated the beneficial effects of the Työhön Job Search Intervention for job seekers on re-employment and mental health have not revealed the specific mediators of these effects. The present study examined two specific mediators that were targeted by the intervention, job-search self-efficacy and inoculation against setbacks, as components of a global construct referred to as job-search preparedness. The hypothesis that job-search preparedness is the main mediator of the effects of the intervention on the outcomes was then tested using data from the 1261 participants of the Finnish Työhön Job Search Intervention study. ANOVA demonstrated that the Työhön intervention produced a significant increase in both job-search self-efficacy and inoculation against setbacks (both p<0.001). Further structural equation modelling demonstrated that the intervention increased job-search preparedness (,,=,0.21, p<0.001) which had statistically significant mediating effects on increasing re-employment (,,=,0.12, 0.10, p<0.01, 0.05, respectively), and decreasing financial strain and depressive symptoms (,,=,from ,0.09 to ,0.14, p<0.01 to 0.001). Future studies should expand the conceptualization of job-search preparedness with assessment of job-search skills as an additional component. Copyright © 2005 John Wiley & Sons, Ltd. [source] | ||||||||||||||||||||||||||||||||||