Taxometric Investigation of PTSD: data from two nationally representative samples

Current psychiatric nosology depicts posttraumatic stress disorder (PTSD) as a discrete diagnostic category. However, only one study has examined the latent structure of PTSD, and this study suggested that PTSD may be more accurately conceptualized as an extreme reaction to traumatic life events rather than a discrete clinical syndrome. To build on the existing literature base, the present research examined the latent structure of posttraumatic stress reactions by applying three taxometric procedures (MAXEIG, MAMBAC, and L-Mode) to data collected from large nationally representative samples of women (ns = 2684 and 3033) and adolescents (n = 3775). Results consistently provided evidence for a dimensional PTSD solution across samples and statistical procedures. These findings have important implications for the theory, assessment, and investigation of posttraumatic stress reactions.     

Disgust vulnerability and symptoms of contamination-based OCD: descriptive tests of incremental specificity

The present investigation examines the incremental association between disgust propensity and sensitivity and contamination-based obsessive-compulsive disorder (OCD) symptoms. Structural equation modeling in Study 1 indicated that general disgust was related to contamination fear even when controlling for negative affect in a nonclinical sample. Evidence was also found for a model in which the effect of negative affect on contamination fear is mediated by general disgust. Study 1 also showed that both disgust sensitivity and disgust propensity uniquely predicted contamination fear when controlling for negative affect. Growth curve analyses in Study 2 indicated that higher baseline contamination fear is associated with less reduction in contamination fear over a 6-week period as disgust sensitivity increases even when controlling for negative affect. Lastly, disgust propensity was associated with concurrent levels of excessive washing symptoms among patients with OCD in Study 3 when controlling for depression. Implications of these findings from nonclinical, analogue, and clinical samples for future research on the specificity of disgust-related vulnerabilities in the etiology of contamination concerns in OCD are discussed.     

The Effects of Collectivistic and Individualistic Values on Conflict and Decision Making: An Experiment in China

In an experiment with 80 participants in China, protagonists with opposing views in organizations that valued collectivism, compared to individualism, were found to develop cooperative goals, were confident that they could work, sought to understand, and demonstrated that they understood the opposing arguments, accepted these arguments as reasonable, and combined positions to create an integrated decision. The inductions comparing participants who valued harmony as a goal or a technique in which they pretended to agree were only partially effective and did not yield significant differences on conflict dynamics and outcomes. Findings challenge traditional theorizing that collectivistic values lead to conflict avoidance, and support recent arguments that strong, cooperative relationships promote the productive discussion of opposing views in decision making.     

Conflict Management for Justice,Innovation, and Strategic Advantage in Organizational Relationships

This study proposed that conflict management affects organizations’ beliefs that they have an effective voice (procedural justice), have shared their benefits fairly (distributive justice), and are treated respectfully (interactional justice). Structural equation analysis results suggest that a cooperative approach to conflict facilitates justice in its 3 forms in organizational relationships, and that justice, in turn, results in partner strategic advantage and innovation. Results from a sample of 103 pairs of customer and supplier organizations in Shanghai were interpreted as providing support for the value of justice for collaborative work between organizations. The findings also suggest that a cooperative approach to managing conflict is an important antecedent to justice in organizational relationships in China.     

REJOINDER: Picasso's Guernica Creativity as a Darwinian Process: Definitions,Clarifications, Misconceptions,and Applications

The author responds to four commentaries on Simonton (this issue). The response deals with two sets of issues. First are criticisms of the Darwinian theory of creativity, especially as applied to Picasso's sketches for the Guernica. These criticisms range from the presumed role of associative processes to the essential nature of any Darwinian model. The second set of issues pertains to diverse methodological objections with respect to measurement and data analysis. The author responds to each and every point. The author concludes not only that Picasso's creative process is best described as Darwinian, but also that the Darwinian theory of creativity has been notably strengthened by the current exchange.     

Taking the U.S. Patent Office Criteria Seriously: A Quantitative Three-Criterion Creativity Definition and Its Implications

Although creativity has recently attracted considerable theoretical and empirical research, researchers have yet to reach a consensus on how best to define the phenomenon. To help establish a consensus, a definition is proposed that is based on the three criteria used by the United States Patent Office to evaluate applications for patent protection. The modified version uses the criteria of novelty, utility, and surprise. Moreover, creativity assessments based on these three criteria are quantitative and multiplicative rather than qualitative or additive. This three-criterion definition then leads to four implications regarding (a) the limitations to domain-specific expertise, (b) the varieties of comparable creativities, (c) the contrast between subjective and objective evaluations, and (d) the place of blind variation and selective retention in the creative process. These implications prove that adding the third criterion has critical consequences for understanding the phenomenon. Creativity is not only treated with superior sophistication, but also paradoxes that appear using the most common two-criterion definition readily disappear when the third criterion is included in the analysis. Hence, the conceptual differences between two- and three-criterion definitions are not trivial.     

Causal Analysis to Enhance Creative Problem-Solving: Performance and Effects on Mental Models

In recent years, it has become apparent that knowledge is a critical component of creative thought. One form of knowledge that might be particularly important to creative thought relies on the mental models people employ to understand novel, ill-defined problems. In this study, undergraduates were given training in the use of causal relationships in applying mental models in creative problem-solving. A pre-post design was used to assess the effects of this training on mental models and creative problem-solving. It was found that causal analysis training resulted in the acquisition of better mental models (in terms of subjective and objective attributes) and better solutions (in terms of quality, originality, and elegance) to problems calling for creative thought among high-ability participants. The implications of these findings for understanding the role of mental models in creative problem-solving are discussed.     

The Effect of Removing Superstitious Behavior and Introducing a Pre-Performance Routine on Basketball Free-Throw Performance

Abstract

A meta-analysis was conducted on 40 studies (76 effects) in order to examine exercise training as a method of stress-management treatment for adults. It offered evidence of a low-to-moderate positive effect in anxiety reduction. Exercise training studies that examined change from pre to post-treatment and studies that examined both change over time and between group differences were examined separately. The unbiased weighted average effect sizes were .45 and .36, respectively. Thus, exercise training improved anxiety levels an average of .36 standard deviations over alternative or control conditions. Adults who were more likely to have a stressful lifestyle benefited more from the exercise training than those who did not. Recommendations are made for both practice and research.     

Examination of ethnic group differential responding on a biodata instrument

Biodata is a selection device that is often cited for high criterion validity and low adverse impact, yet little research examines the latter point. Further, little is known about whether differential biodata item responding by ethnic group occurs, and if so, whether this impacts ethnic group differences, predictive bias, adverse impact, and criterion validity. Data from 5,242 applicants for a government agency position indicated that elimination of biodata item response options with differential ethnic group selection rates from scoring consideration resulted in a large decrease in ethnic group differences, no predictive bias, less potential adverse impact, and a nonsignificant decrease in criterion validity. Results are compared to a general mental ability measure. Implications and future research directions are discussed.     

An Experiment upon Repeated Reproduction

The author presented dwarf hamsters (Phodopus campbelli) and golden hamsters (Mesocricetus auratus) with conspecific and inanimate signals for food. Both species approached a cardboard stimulus that predicted food. The dwarf hamsters engaged in high levels of social contact directed toward a conspecific conditioned stimulus for food, but the golden hamsters did not. The author also presented dwarf hamsters with a conspecific signal that did not indicate food, and the levels of social behaviors that they directed toward it were significantly lower. These results suggest the presence of a social component in the dwarf hamster feeding system and are consistent with previous findings that the social transmission of food preferences occurs more readily in dwarf hamsters than in golden hamsters.