The structure of personal values: a conical representation of multiple life areas

The objective of the present study was to analyze the structure of personal values. Based on previous investigations, we proposed a multifaceted definition of values from various life areas (or domains). Structural hypotheses concerning the relationships between the definitional framework and empirical observations were formulated. Using data obtained from two samples of Israeli respondents (153 business students and 146 computer personnel), the hypotheses were examined and supported. Two basic sets of components: life areas (work, religion, culture, sports, politics, and life in general which primarily concerns home and family) and modalities (material, affective, and cognitive), were distinguished and confirmed by means of factor analysis and facet analysis. A three-dimensional conical representation of the personal values domain was revealed. The structural analysis reflected several differences among the attributes of life areas, such as the obligatory or optional nature of their activities. Theoretical implications as well as suggestions for further research are outlined.     

Evidence for the Role of Infectious Disease in Species Extinction and Endangerment

Abstract:  Infectious disease is listed among the top five causes of global species extinctions. However, the majority of available data supporting this contention is largely anecdotal. We used the IUCN Red List of Threatened and Endangered Species and literature indexed in the ISI Web of Science to assess the role of infectious disease in global species loss. Infectious disease was listed as a contributing factor in <4% of species extinctions known to have occurred since 1500 (833 plants and animals) and as contributing to a species' status as critically endangered in <8% of cases (2852 critically endangered plants and animals). Although infectious diseases appear to play a minor role in global species loss, our findings underscore two important limitations in the available evidence: uncertainty surrounding the threats to species survival and a temporal bias in the data. Several initiatives could help overcome these obstacles, including rigorous scientific tests to determine which infectious diseases present a significant threat at the species level, recognition of the limitations associated with the lack of baseline data for the role of infectious disease in species extinctions, combining data with theory to discern the circumstances under which infectious disease is most likely to serve as an agent of extinction, and improving surveillance programs for the detection of infectious disease. An evidence-based understanding of the role of infectious disease in species extinction and endangerment will help prioritize conservation initiatives and protect global biodiversity.     

Predicting burnout with a hassle-based measure of role demands

The paper presents a hassle-based measure of job demands, whose scales of hassles-conflict, hassles-ambiguity and hassles-overload consist of items pertaining to such role episodes. Hierarchical multiple regression is used to test the incremental validity of the new variables. This was done with a statistical model where the role stressor variables (i.e. role conflict, role ambiguity, and role overload) were entered first, followed by the three equivalent hassle variables. The data indicate that the new Role Hassles Index (RHI) shows a substantial R² increment with regard to the MBI's exhaustion and depersonalization scales, but not in regard to self-accomplishment. These data are interpreted as supporting a balance model of burnout, specifying that exhaustion is an outcome of daily demand level on the one hand, and recovery availability on the other. © 1997 by John Wiley & Sons, Ltd.     

The Potential Conservation Value of Non‐Native Species

Abstract: Non‐native species can cause the loss of biological diversity (i.e., genetic, species, and ecosystem diversity) and threaten the well‐being of humans when they become invasive. In some cases, however, they can also provide conservation benefits. We examined the ways in which non‐native species currently contribute to conservation objectives. These include, for example, providing habitat or food resources to rare species, serving as functional substitutes for extinct taxa, and providing desirable ecosystem functions. We speculate that non‐native species might contribute to achieving conservation goals in the future because they may be more likely than native species to persist and provide ecosystem services in areas where climate and land use are changing rapidly and because they may evolve into new and endemic taxa. The management of non‐native species and their potential integration into conservation plans depends on how conservation goals are set in the future. A fraction of non‐native species will continue to cause biological and economic damage, and substantial uncertainty surrounds the potential future effects of all non‐native species. Nevertheless, we predict the proportion of non‐native species that are viewed as benign or even desirable will slowly increase over time as their potential contributions to society and to achieving conservation objectives become well recognized and realized.     

Work values: A theoretical overview and a model of their effects

Three main streams of research were identified in the field of work values. Based on a series of analyses using multidimensional techniques, the first set of studies attempted to identify the underlying factors or facets of the work values domain. A second group of investigations examined correlates of work values including antecedent and consequent variables. Finally, extensive research on differences in work values' pattern and level by culture have been reported. For purposes of integrating the diverse findings, the basic facets of the work values domain were identified and a model of their effects on behavior was suggested     

The structure and strength of achievement motivation: A cross-cultural comparison

An intercultural research project on achievement motivation was originated based on a multifaceted approach. The objective of this study was to analyze the structure of the achievement motive domain for samples from five countries: the United States, the Netherlands, Israel, Hungary, and Japan. We hypothesized that data collected from the various samples will reflect the basic facets suggested by the definitional framework of achievement motivation. In addition, it was hypothesized that the individualistic and collectivistic cultural orientations will have an effect on motive strength. Results from 1868 respondents supported the hypotheses. The three basic facets of the definition of achievement motive: behavior modality (instrumental, affective, or cognitive), type of confrontation (confronting oneself or matching solutions to challenges), and time perspective relative to task performance (before, during, or after performance), were reflected as major determinants of the data. Achievement tendencies were highest for U.S.A. respondents (individualistic culture) and lowest for the Japanese and the Hungarian respondents (collectivistic societies). Theoretical implications as well as suggestions for further research were outlined.