Illusory correlations in perceptions and predictions of organizational traits

People often believe in ‘illusory’ correlations between variables that are similar, but not actually correlated. This study suggests that judgments of organizational traits reflect illusory correlations, because subjects' perceptions of correlations between traits, and the predictions of Hage's (1965) ‘axiomatic’ theory, were more highly correlated with independent similarity ratings than with actual correlations between traits. Some methodological reasons why organizational-trait theories might unwittingly produce illusory correlation predictions are discussed, along with possible remedies.     

Repeated challenge studies: A comparison of union-intersection testing with linear modeling

Challenge studies are often implemented for assessing whether a subject is sensitive to a certain agent or allergen. In particular, researchers test groups of subjects to determine if there really exists a causal relationship between some agent of interest and a response. To answer such a question, we need to detect the presence of the phenomenon in just one individual. Typically, however, there are a large number of unknown risk factors associated with the response and a potentially small population prevalence. Hence, standard statistical techniques, by averaging the treatment effect across the group, may miss a significant response of a single individual and lead to inconclusive results. We develop an alternative approach based on union-intersection testing that will allow a practitioner to correctly examine observations on an individual apart from the other subjects and test the hypothesis of interest: Does the phenomenon exist in the population? More specifically, we show how this technique adjusts for the multiple number of tests encountered when analyzing data for each individual subject separately. Furthermore, we demonstrate power calculations for the determination of sample size prior to performing the study. The performance of the union-intersection approach in comparison to linear models and semiparametric techniques is considered through sample size calculations and simulations. The union-intersection testing methodology out performs the Kolmogorov tests. However, the nested linear model performs as well if not better than the union-intersection tests. To illustrate the ideas presented in the paper, we provide an application in which we analyze psychological data collected by way of a challenge study design.     

Parent Care in the Context of Women's Multiple Roles

This article addresses the multiple roles held by women involved in parent care and the ways in which these roles affect the women's well-being. Research on women's roles (including that of caregiver) has been guided by two opposing perspectives, the scarcity hypothesis and the expansion hypothesis. Findings from our studies of role quality, role combinations, and role spillover have provided abundant evidence that the lives of these women cannot be easilycaptured by either the scarcity or the expansion hypothesis alone.     

Optimal choice

We present a classification and theoretical analysis of discrete-trial and free-operant choice procedures in which reinforcement is assigned to one alternative only, or independently to both, is either always available or conditionally available, and is either "held" or not from trial to trial. Momentary-maximizing and (globally) optimal choice sequences are defined in terms of initializing and marker events. Free-operant choice is analyzed in terms of a clock space whose axes are the times since the last A and B choices. The analysis shows that most molar matching data are derivable from momentary maximizing, and that the momentary-maximizing hypothesis has not been adequately tested in either discrete-trial or free-operant situations.     

Teasdale's differential activation hypothesis: implications for mechanisms of depressive relapse and suicidal behaviour

Teasdale's differential activation hypothesis (DAH) has been proposed as one account of cognitive vulnerability to depression. This view holds that important factors determining whether one's initial depression becomes more severe or persistent are the degree of activation, and content, of negative thinking patterns that become accessible in the depressed state. This phenomenon has been referred to as cognitive reactivity. Empirical support for the predictions of this model derives from a combination of cross-sectional and prospective studies. In this article, we evaluate this evidence with the goal of determining whether mood-induced cognitive reactivity can be considered a risk factor for depressive relapse/recurrence. Our review demonstrates sufficient evidence to consider cognitive reactivity as a potential causal risk factor for depressive relapse/recurrence. Furthermore, we extend the application of this model to the problem of suicidal relapse/recurrence including a review of preliminary support for this approach.     

Human observing: Maintained by stimuli correlated with reinforcement but not extinction

College students received points exchangeable for money (reinforcement) on a variable-time 60-second schedule that alternated randomly with an extinction component. Subjects were informed that responding would not influence either the rate or distribution of reinforcement. Instead, presses on either of two levers (“observing responses”) produced stimuli. In each of four experiments, stimuli positively correlated with reinforcement and/or stimuli uncorrelated with reinforcement were each chosen over stimuli correlated with extinction. These results are consistent with prior results from pigeons in supporting the conditioned-reinforcement hypothesis of observing and in not supporting the uncertainty-reduction hypothesis.