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Different Explanations (different + explanation)
Selected AbstractsThe confounding role of personality and trait affectivity in the relationship between job and life satisfactionJOURNAL OF ORGANIZATIONAL BEHAVIOR, Issue 7 2002Daniel Heller Previous research has demonstrated a strong positive relationship between job and life satisfaction. Traditionally, this relationship has been explained in terms of a spillover model, wherein job experiences spill over onto life, and vice versa. This study directly tests a different explanation for this relationship: personality traits that influence both job and life satisfaction. In a longitudinal test with multisource data, three typologies, which were shown by past research to be linked to both job and life satisfaction, were examined: Big Five, positive and negative affectivity, and core self-evaluations. One hundred and fifty-three university employees working in a diverse set of occupations were surveyed twice, with a six month time interval; the first survey also included a second questionnaire to be completed by a ,significant other.' Analyses of concurrent and prospective zero-order and partial correlations, as well as structural equation modeling, supported the hypothesized confounding role of all three typologies, especially core self-evaluations. Though controlling for personality reduced the magnitude of the job,life satisfaction relationship, it did not entirely eliminate it. Overall, the results suggest the presence of both dispositional and environmental factors in job and life satisfaction. Finally, implications for organizational practice and theory development are discussed. Copyright © 2002 John Wiley & Sons, Ltd. [source] Antiatherogenic properties of lipid minor constituents from seed oilsJOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 12 2003Haralabos C Karantonis Abstract A number of lines of evidence suggest that seed oils exhibit a protective effect against atherogenesis. Most of the protective compounds are still unidentified. In this study, polar lipids of seed oil samples from sesame, corn and sunflower were successively fractionated by high-performance liquid chromatography. Each isolated lipid compound was tested in vitro for its ability to inhibit platelet-activating factor (PAF) and thrombin-induced washed rabbit platelet aggregation or to cause platelet aggregation. A significant number of lipids that exerted the above biological activities were detected. The most biologically active compounds were subjected to biological, chemical and spectroscopic analyses, and their structural data are presented. These results give a different explanation for the antiatherogenic action that seed oils exert. Given that PAF plays a pivotal role in atherogenesis, the fact that these oils contain PAF antagonists suggests their high nutritional value. Copyright © 2003 Society of Chemical Industry [source] Explaining the Weak Relationship Between Job Performance and Ratings of Job PerformanceINDUSTRIAL AND ORGANIZATIONAL PSYCHOLOGY, Issue 2 2008KEVIN R. MURPHY Ratings of job performance are widely viewed as poor measures of job performance. Three models of the performance,performance rating relationship offer very different explanations and solutions for this seemingly weak relationship. One-factor models suggest that measurement error is the main difference between performance and performance ratings and they offer a simple solution,that is, the correction for attenuation. Multifactor models suggest that the effects of job performance on performance ratings are often masked by a range of systematic nonperformance factors that also influence these ratings. These models suggest isolating and dampening the effects of these nonperformance factors. Mediated models suggest that intentional distortions are a key reason that ratings often fail to reflect ratee performance. These models suggest that raters must be given both the tools and the incentive to perform well as measurement instruments and that systematic efforts to remove the negative consequences of giving honest performance ratings are needed if we hope to use performance ratings as serious measures of job performance. [source] Sources of Negative Attitudes toward Immigrants in Europe: A Multi-Level Analysis,INTERNATIONAL MIGRATION REVIEW, Issue 1 2010Elisa Rustenbach In recent times, many nations are experiencing an increase in anti-immigrant attitudes on the part of natives. Most papers only explore one or two sources of anti-immigrant attitudes at a time, which provides an incomplete picture of the effects at work. This paper tests eight different explanations for anti-immigrant attitudes: cultural marginality theory, human capital theory, political affiliation, societal integration, neighborhood safety, contact theory, foreign investment, and economic competition. Analysis is conducted using combined data from the European Social Survey and Eurostat/OECD and individual-, regional-, and national-level predictors. Results indicate that key predictors of anti-immigrant attitudes are regional and national interpersonal trust, education level, foreign direct investment, and political variables. [source] Monkeys and apes: Are their cognitive skills really so different?AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, Issue 2 2010Federica Amici Abstract Differences in cognitive skills across taxa, and between monkeys and apes in particular, have been explained by different hypotheses, although these often are not supported by systematic interspecific comparisons. Here, we directly compared the cognitive performance of the four great apes and three monkey species (spider monkeys, capuchin monkeys, and long-tailed macaques), differing in their phylogenetic-relatedness and socioecology. We tested subjects on their ability to remember object locations (memory task), track object displacements (transposition task), and obtain out-of-reach rewards (support task). Our results showed no support for an overall clear-cut distinction in cognitive skills between monkeys and apes as species performance varied substantially across tasks. Although we found differences in performance at tracking object displacements between monkeys and apes, interspecific differences in the other two tasks were better explained in terms of differential socioecology, especially differential levels of fission,fusion dynamics. A cluster analysis using mean scores of each condition of the three tasks for each species suggested that the only dichotomy might be between members of the genus Pan and the rest of the tested species. These findings evidence the importance of using multiple tasks across multiple species in a comparative perspective to test different explanations for the enhancement of specific cognitive skills. Am J Phys Anthropol 143:188,197, 2010. © 2010 Wiley-Liss, Inc. [source] A Loss of Faith: The Sources of Reduced Political Legitimacy for the American Medical ProfessionTHE MILBANK QUARTERLY, Issue 2 2002Mark Schlesinger Writing at the beginning of the 20th century, Shaw identified one of the significant contemporary transformations in industrial democracies. In part as the result of advances in science and technology, in part as a rejection of the monopolistic abuses of industrialization, and in part as a consequence of assiduous efforts by the professions themselves, this was a period in which the legitimacy and social authority of professionals increased dramatically (Brint 1994; Krause 1996; Larson 1977; Sandel 1996). Nowhere was this more evident than in medicine. Over several decades, medicine changed from an occupation with a mixed reputation and little political influence into one that would "dominate both policy and lay perceptions of health problems" (Freidson 1994, 31). In a number of countries, the professional authority and political influence of physicians also rose during this era (Coburn, Torrance, and Kaufert 1983; Krause 1996; Stone 1980), most dramatically in the United States (Starr 1982). The political legitimacy and policymaking influence of the medical profession have greatly declined in American society over the past 30 years. Despite speculation about the causes, there has been little empirical research assessing the different explanations. To address this gap, data collected in 1995 are used to compare attitudes of the American public and policy elites toward medical authority. Statistical analyses reveal that (1) elites are more hostile to professional authority than is the public; (2) the sources of declining legitimacy are different for the public than they are for policy elites; and (3) the perceptions that most threaten the legitimacy of the medical profession pertain to doubts about professional competence, physicians' perceived lack of altruism, and limited confidence in the profession's political influence. This article concludes with some speculations about the future of professional authority in American medicine. [source] Explaining the Rise of Class Politics in VenezuelaBULLETIN OF LATIN AMERICAN RESEARCH, Issue 2 2009OLIVER HEATH The sudden rise to power of leftist former coup leader Hugo Chávez and the subsequent politicisation of social class raises a number of interesting questions about the sources of class politics and political change in Venezuela. Using nationally representative survey data over time, this article considers different explanations for the rise of class politics. It argues that explanations for the politicisation of class can best be understood in terms of ,top-down' approaches that emphasise the role of political agency in reshaping and re-crafting political identities, rather than more ,bottom-up' factors that emphasise the demands that originate within the electorate. The economic crises during the 1990s undermined support for the existing parties, but it did not create a politically salient class-based response. Rather, it created the electoral space that facilitated new actors to enter the political stage and articulate new issue dimensions. [source] Effects of Aggression on Achievement: Does Conflict With the Teacher Make It Worse?CHILD DEVELOPMENT, Issue 6 2008Deborah Stipek This longitudinal study examined different explanations for negative associations between aggression and academic achievement using data collected from 403 children from low-income families followed from kindergarten or first grade (ages 6 and 7 years) through fifth grade (ages 10,11 years). Most results of growth curve analyses examining change over time and path analyses examining associations among the variables within grades were consistent with the hypothesis that the effect of aggression on achievement was partially mediated by the conflictual relationships relatively more aggressive children tended to develop with their teachers and concomitant reductions in engagement in academic tasks. The evidence suggested, however, that the relationship between aggression and achievement is complex and reciprocal. Gender differences were also observed. 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