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Hypothesized Model (hypothesized + model)
Selected AbstractsIdeological 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] Testing the Biobehavioral Family Model in Pediatric Asthma: Pathways of EffectFAMILY PROCESS, Issue 1 2008BEATRICE L. WOOD PH.D. This study uses a laboratory-based multiinformant, multimethod approach to test the hypothesis that a negative family emotional climate (NFEC) contributes to asthma disease severity by way of child depressive symptoms, and that parent-child relational insecurity mediates the effect. Children with asthma (n=199; aged 7,17; 55% male) reported parental conflict, parent-child relational security, and depressive symptoms. Parent(s) reported demographics, asthma history, and symptoms. Asthma diagnosis was confirmed by clinical evaluation and pulmonary function tests, with disease severity rated by an asthma clinician according to NHLBI guidelines. Family interactions were evoked using the Family Process Assessment Protocol, and rated using the Iowa Family Interaction Rating Scales. Path analysis indicated a good fit of data to the hypothesized model (,2[1]=.11, p=.74, NFI=.99, RMSEA=.00). Observed NFEC predicted child depression (,=.19, p<.01), which predicted asthma disease severity (,=.23, p<.01). Relational security inversely predicted depressive symptoms (,=,.40, p<.001), and was not a mediator as predicted, but rather an independent contributor. The findings are consistent with the Biobehavioral Family Model, which suggests a psychobiologic influence of specific family relational processes on asthma disease severity by way of child depressive symptoms. RESUMEN Prueba del Biobehavioral Family Model (Modelo familiar de biocomportamiento) en asma pediátrica: Factores desencadenantes Objetivo: Este estudio utiliza un método de laboratorio con varios informantes y distintos enfoques para probar la hipótesis de que un ambiente familiar negativo agrava la enfermedad del asma a través de síntomas de depresión infantil, y que la inseguridad en la relación entre padres e hijos influye en su efecto. Sujetos y métodos: Una serie de niños que padecen asma (n=199; edades entre 7 y 17; 55% varones) informaron sobre conflictos de pareja de sus padres, la seguridad en la relación con sus padres y síntomas de depresión. Los padres, por su parte, aportaron datos demográficos, antecedentes de asma e información acerca de los síntomas. El diagnóstico de asma fue confirmado por examen clínico y pruebas de pulmón, y un experto en asma determinó la gravedad de la enfermedad de acuerdo con las pautas del NHLBI (National Heart, Lung, and Blood Institute). La interacción en familia fue simulada mediante el método Family Process Assessment Protocol (protocolo de evaluación de dinámicas familiares) y estimada mediante el Iowa Family Interaction Rating Scales (escala Iowa de interacciones familiares). Resultados: El análisis de camino demostró que los datos encajaron bien con el modelo de la hipótesis (,2[1]=.11, p=.74, NFI=.99, RMSEA=.00). En las familias en las que se observó un ambiente emocional negativo se predijo la depresión del niño o de la niña (,=.19, p<.01), lo que, a su vez, predijo un agravamiento del asma (,=.23, p<.01). Por otra parte, las relaciones positivas predijeron síntomas de depresión de manera inversa (,=.40, p<.001), y no resultaron ser un mediador, como se había predicho, sino un contribuidor independiente. Conclusión: Las averiguaciones coinciden con el Biobehavioral Family Model (modelo familiar de biocomportamiento), que sugiere la existencia de una influencia psicobiológica de procesos de relaciones familiares específicos en la gravedad de la enfermedad del asma a través de síntomas de depresión infantil. [source] The effect of learning organization culture on the relationship between interpersonal trust and organizational commitmentHUMAN RESOURCE DEVELOPMENT QUARTERLY, Issue 2 2009Ji Hoon Song The primary purpose of this research was to assess the effect of learning organization culture on the linkage between interpersonal trust and organizational commitment. The study sample was obtained from employees of two major Korean conglomerates. Online questionnaires were completed by 321 respondents. Structural equation modeling (SEM) was used to detect the effects of learning organization culture on the basis of the model fit to data comparisons and the significance of path coefficient estimates in the hypothesized model. The results suggest that learning organization culture works as a mediating variable to explain the association between interpersonal trust and organizational commitment. Recommendations for future research and implications for human resource development research and practice are discussed. [source] Modelling cellular senescence as a result of telomere stateAGING CELL, Issue 3 2003Carole J. Proctor Summary Telomeres in mammalian cells end in large duplex T loops. These loops protect the single-strand overhangs from degradation and/or interactions with signalling proteins. This protection is sometimes referred to as capping. At each cell division, telomeres shorten and there is a general consensus that telomere shortening triggers cell cycle exit. However, the exact mechanism by which telomere shortening causes cell cycle arrest is not known. Mathematical models of telomere shortening have been developed to help us understand the processes involved. Until now most models have assumed that the trigger for cell cycle arrest is the first telomere or a group of telomeres reaching a critically short length. However, there is evidence that cells stop cycling over a wide range of telomere lengths. This suggests that telomere length per se may not in fact be the trigger for cellular senescence. In this paper we develop a model which examines the hypothesis that uncapping of a telomere is the main trigger. By letting the probability of uncapping depend upon telomere length, we show that the hypothesized model provides a good fit to experimental data. [source] Empowerment, engagement and perceived effectiveness in nursing work environments: does experience matter?JOURNAL OF NURSING MANAGEMENT, Issue 5 2009HEATHER K. SPENCE LASCHINGER RN Aims, We examined the impact of empowering work conditions on nurses' work engagement and effectiveness, and compared differences among these relationships in new graduates and experienced nurses. Background, As many nurses near retirement, every effort is needed to retain nurses and to ensure that work environments are attractive to new nurses. Experience in the profession and generational differences may affect how important work factors interact to affect work behaviours. Methods, We conducted a secondary analysis of survey data from two studies and compared the pattern of relationships among study variables in two groups: 185 nurses 2 years post-graduation and 294 nurses with more than 2 years of experience. Results, A multi-group SEM analysis indicated a good fit of the hypothesized model. Work engagement significantly mediated the empowerment/effectiveness relationship in both groups, although the impact of engagement on work effectiveness was significantly stronger for experienced nurses. Conclusions, Engagement is an important mechanism by which empowerment affects nurses feelings of effectiveness but less important to new graduates' feelings of work effectiveness than empowerment. Implications for nursing management, Managers must be aware of the role of empowerment in promoting work engagement and effectiveness and differential effects on new graduates and more seasoned nurses. [source] Work-life benefits and positive organizational behavior: is there a connection?JOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 2 2008Lori Muse Focusing on the employee well-being component of positive organizational behavior (POB), this study explores the relationship between organization provided benefit programs and POB. Specifically, we ask the question: are employees' use and perceived value of a work-life benefit package associated with their positive attitudes and behaviors in the workplace? Grounded in social exchange theory and the norm of reciprocity, we develop and estimate a model identifying differential relationships of benefit use and perceived benefit value with employee attitudinal and performance outcomes. Employing the multigroup method, the hypothesized model was fit to the data of two dissimilar organizations. Results support our hypothesis that providing work-life benefits employees use and/or value is part of a positive exchange between the employee and employer. This exchange is positively related to employees' feelings of perceived organizational support and affective commitment to the organization and reciprocation in the form of higher levels of task and contextual performance behaviors. Results also revealed that employees' perceptions of benefit program value play a critical role regardless of actual program use in influencing attitudes and behavior. Our findings emphasize the importance of valuing employees and investing in their well-being inside as well as outside the workplace. Copyright © 2008 John Wiley & Sons, Ltd. [source] Personal Characteristics and Resilience to Economic Hardship and Its Consequences: Conceptual Issues and Empirical IllustrationsJOURNAL OF PERSONALITY, Issue 6 2009M. Brent Donnellan ABSTRACT This article describes a theoretical model that links personal characteristics with resilience to economic hardship and its psychological and interpersonal consequences. This transactional model integrates social influence and social selection perspectives concerning the relation between socioeconomic circumstances and the development of individuals and families. In addition, this article discusses methodological and conceptual issues related to investigating the effects of personal characteristics in this context. Finally, initial empirical support for some of the key predictions from the proposed model are provided using longitudinal data collected from a sample of Midwestern families. Specifically, adolescent academic achievement, self-reports of Conscientiousness, and self-reports of low Neuroticism during adolescence predicted relevant outcomes in adulthood such as less economic pressure, more satisfying romantic relationships, and less harsh parenting behaviors. These preliminary findings support the hypothesized model and extend research concerning the life course outcomes associated with personal characteristics. [source] Alcohol Expectancies and Drinking Refusal Self-Efficacy Mediate the Association of Impulsivity With Alcohol MisuseALCOHOLISM, Issue 8 2010Matthew J. Gullo Background:, Recent work suggests that 2 biologically based traits convey risk for alcohol misuse: reward sensitivity/drive and (rash) impulsiveness. However, the cognitive mechanisms through which these traits convey risk are unclear. This study tested a model predicting that the risk conveyed by reward sensitivity is mediated by a learning bias for the reinforcing outcomes of alcohol consumption (i.e., positive alcohol expectancy). The model also proposed that the risk conveyed by rash impulsiveness (RI) is mediated by drinkers' perceived ability to resist alcohol (i.e., drinking refusal self-efficacy). Methods:, Study 1 tested the model in a sample of young adults (n = 342). Study 2 tested the model in a sample of treatment-seeking substance abusers (n = 121). All participants completed a battery of personality, cognitive, and alcohol use questionnaires and models were tested using structural equation modeling. Results:, In both studies, the hypothesized model was found to provide a good fit to the data, and a better fit than alternative models. In both young adults and treatment-seeking individuals, positive alcohol expectancy fully mediated the association between reward sensitivity and hazardous alcohol use. For treatment seekers, drinking refusal self-efficacy fully mediated the association between RI and hazardous drinking. However, there was partial mediation in the young adult sample. Furthermore, neither trait was directly associated with the other cognitive mediator. Conclusions:, The hypothesized model was confirmed on a large sample of young adults and replicated on a sample of treatment-seeking substance abusers. Taken together, these findings shed further light on the mechanisms through which an impulsive temperament may convey risk for alcohol misuse. [source] A STRUCTURAL EQUATION MODELING OF ALCOHOL USE AMONG YOUNG ADULTS IN THE U.S. MILITARY: COMPLEXITIES AMONG STRESS, DRINKING MOTIVES, IMPULSIVITIY, ALCOHOL USE AND JOB PERFORMANCEALCOHOLISM, Issue 2008Sunju Sohn Aims:, Young male adults in the U. S. military drink at much higher rates than civilians and females of the same age. Drinking has been shown to be associated with stress and individuals' ability to effectively cope with stressors. Despite numerous studies conducted on young adults' drinking behaviors such as college drinking, current literature is limited in fully understanding alcohol use patterns of the young military population. The aim of the present study was to develop and test the hypothesized Structural Equation Model (SEM) of alcohol use to determine if stress coping styles moderate the relationship between stress, drinking motives, impulsivity, alcohol consumption and job performance. Methods:, Structural equation models for multiple group comparisons were estimated based on a sample of 1,715 young (aged 18 to 25) male military personnel using the 2005 Department of Defense Survey of Health Related Behaviors among Military Personnel. Coping style was used as the grouping factor in the multi-group analysis and this variable was developed through numerous steps to reflect positive and negative behaviors of coping. The equivalences of the structural relations between the study variables were then compared across two groups at a time, controlling for installation region, race/ethnicity, marital status, education, and pay grade, resulting in two model comparisons with four coping groups. If the structural weight showed differences across groups, each parameter was constrained and tested one at a time to see where the models are different. Results:, The results showed that the hypothesized model applies across all groups. The structural weights revealed that a moderation effect exists between a group whose tendency is to mostly use positive coping strategies and a group whose tendency is to mostly use negative coping strategies (,,2(39)= 65.116, p<.05). More specifically, the models were different (with and without Bonferroni Type I error correction) in the paths between "motive and alcohol use" and "alcohol use and alcohol-related consequences (job performance)." Conclusions:, It seems plausible that coping style significantly factors into moderating alcohol use among young male military personnel who reportedly drink more excessively than civilians of the same age. The results indicate that it may be particularly important for the military to assess different stress coping styles ofyoung male military personnel so as to limit excessive drinking as well as to promote individual wellness and improve job performance. [source] A Model of Adaptive Language LearningMODERN LANGUAGE JOURNAL, Issue 3 2006LINDY J. WOODROW This study applies theorizing from educational psychology and language learning to hypothesize a model of language learning that takes into account affect, motivation, and language learning strategies. The study employed a questionnaire to assess variables of motivation, self-efficacy, anxiety, and language learning strategies. The sample consisted of 275 advanced learners studying English for academic purposes prior to entering Australian universities. The data were analyzed using both variable- and person-centered approaches. The variable-centered approaches included correlational analysis and structural equation modeling, whereas the person-centered approaches utilized cluster analysis and profile analysis using multidimensional scaling (PAMS). The findings supported the hypothesized model of adaptive learning and highlighted the relevance of research in educational psychology for informing language learning research. [source] Sourcing Strategy, Supplier Relationships and Firm Performance: An Empirical Investigation of UK OrganizationsBRITISH JOURNAL OF MANAGEMENT, Issue 2 2007Paul D. Cousins This article conceptualizes and empirically examines buyer,supplier relationships in respect of supply sourcing strategies, relationship characteristics and firm performance. Two sourcing strategies available to organizations are examined, critical and leverage, which in turn, influence the approach to managing the supplier relationship (arms-length or collaborative). We argue that different relationship approaches are appropriate to achieving different performance outcomes. A structural equation model, using a sample of 142 manufacturing firms based in the United Kingdom, is used to test this hypothesized model. The results indicate that a critical sourcing strategy requires collaborative supplier relationships in order to achieve higher relationship and business outcomes, while leverage sourcing strategies have a direct impact on these same performance outcomes. In addition, a leverage strategy was associated with increased levels of supplier power, though this power was found not to have a significant effect on performance. Our study provides support for the importance of aligning sourcing strategies to particular supplier relationship approaches in order to improve firm performance. Managerial implications of these findings and future directions for research are then offered. [source] | |||||||||||||||||||