Testing the Mental Model Theory of Propositional Reasoning

Johnson-Laird, Byrne, and Schaeken (1992) present a theory of propositional reasoning by mental models. The present study provides a comprehensive test of the predictions of that theory for the difficulty of simple disjunctive and conditional inferences. The results are largely consistent with the complex pattern of predictions. They are discussed in the light of recently proposed modifications of the original theory.     

Search Strategies in Practice: Testing the Effect of Inherent Variability on Search Patterns

Abstract

To execute a motor solution to a given task, individuals search through the space of movement possibilities guided by information that arises from the interaction with task and environment. Through this search, individuals seek to avoid inappropriate solutions through local minima in the task space. The processes that lead to some but not all individuals avoiding local minima and finding solutions is not yet understood. Based on the tenets of ecological psychology for perception and action, we examined in two experiments the hypothesis that the incapacity to differentiate errors (performance of an inappropriate solution) from inherent variability would interfere with the perception of properties of the task space and result in a longer time performing an inappropriate solution for the task before exploration of other solutions. Inherent variability was shown to be a direct predictor of the changes in the search strategies. Also, we found that the specifics of the search patterns could predict the performance in the task. Thus, the pattern of motion through the task space affords perception of specific properties of this space guiding individuals in the evolving dynamics of exploration or exploitation.     

Structural Validity and Generalisability of a Referent Cognitions Model of Turnover Intentions

A model proposed and empirically tested by Aquino, Griffeth, Allen, and Hom (1997 ) using employees of a hospital in the northeastern United States was replicated in samples of Korean factory workers from two divisions of a large organisation. Results in both samples suggested that the relationships among model variables and relationships with withdrawal cognitions replicated quite closely. Results also suggested that the way people are treated in an organisation by their supervisors exerts a powerful effect on their turnover‐related responses. Most importantly, the results of this study in combination with the earlier results from Aquino et al. (1997 ) highlight the impact of employee expectations of future job advancement on turnover‐related responses. Employees who perceive that their present situation will improve are more satisfied with their present outcomes and their supervisors. They are also less likely to consider quitting even when being unsatisfied with their present situation. Un modèle proposé et testé empiriquement par Aquino, Griffeth, Allen, and Hom (1997 ) sur des employés d’un hôpital du nord des Etats‐Unis a été réutilisé auprès de plusieurs échantillons de travailleurs d’une usine coréenne appartenant à deux divisions d’une grande organisation. Les résultats sur les deux échantillons montrent que les relations entre les variables du modèle et les relations avec les cognitions défaillantes reproduisent de très près ceux du modèle original. Les résultats montrent aussi que la façon dont les salariés sont traités dans une organisation par leurs supérieurs a de fortes retombées sur leurs réponses concernant les démissions. Plus important encore, les résultats de cette étude en concordance avec ceux initiaux obtenus par Aquino et al. (1997 ), soulignent l’impact des attentes des employés à propos de leur avancement dans leur futur emploi sur leurs réponses concernant les démissions. Les employés qui perçoivent que leur situation présente va s’améliorer sont plus satisfaits de leur rémunération présente et de leurs supérieurs. Ils sont aussi moins enclins à envisager de démissionner même s’ils sont insatisfaits de leur situation présente.     

Predictors of Article Impact in Suicidology: The Bereavement Literature,A Research Note

Citation analysis has been neglected in suicidology. The present note applies a mixed‐methods approach to both test and suggest hypotheses for the variation in article impact in the bereavement literature. One hundred three articles from three core suicidology journals met the criteria for inclusion in the investigation. Citations to the articles were obtained from the Web of Science. Predictor variables included structural characteristics of the author (e.g., gender) and the article itself (e.g., years since publication). A multivariate regression analysis determined that, controlling for the other variables, the most important predictor of citations was the review article (β = .461), followed by year of publication (β = ?.414), the multiauthored article (β = .302), publication in Suicide and Life‐Threatening Behavior (SLTB) (β = .161), and male gender (β = .156). The 12 most cited articles were published between 1979 and 2004 in SLTB. The majority of these papers was written by males, were U.S. authors, and had more than one author. Four of the most cited articles were reviews. The study concludes that structural characteristics of articles and authors explained 41% of the variance in citations. The qualitative analysis determined that review papers, and papers on characteristics of suicide bereavement and psychological autopsies have been most frequently cited. Replication studies are needed for other subfields of suicidology.     

WHY ZYGON? THE JOURNAL'S ORIGINAL VISIONS AND THE FUTURE OF RELIGION‐AND‐SCIENCE

This essay briefly examines the original visions of Zygon, how they helped explain the publication of a new journal, and what they imply for where we might be going today.     

Über induzierte Bewegung

Ohne Zusammenfassung Mit 30 Abbildungen im Text. Herrn Prof.Wertheimer danke ich für die Anregung zu der vorliegenden Arbeit sowie für zahlreiche Ratschl?ge, dem Psychologischen Institut der Universit?t Berlin für die überlassung der R?ume und Apparate, meinen Vpn. für ihre Bereitwilligkeit und Ausdauer.