Bayesian contour integration.

The process by which the human visual system parses an image into contours, surfaces, and objects--perceptual grouping--has proven difficult to capture in a rigorous and general theory. A natural candidate for such a theory is Bayesian probability theory, which provides optimal interpretations of data under conditions of uncertainty. But the fit of Bayesian theory to human grouping judgments has never been tested, in part because methods for expressing grouping hypotheses probabilistically have not been available. This paper presents such methods for the case of contour integration--that is, the aggregation of a sequence of visual items into a "virtual curve." Two experiments are reported in which human subjects were asked to group ambiguous configurations of dots (in Experiment 1, a sequence of five dots could be judged to contain a "corner" or not; in Experiment 2, an arrangement of six dots could be judged to fall into two disjoint contours or one smooth contour). The Bayesian theory accounts extremely well for subjects' judgments, explaining more than 75% of the variance in both tasks. The theory thus provides a far more quantitatively precise account of human contour integration than has been previously possible, allowing a very precise calculation of the subjective goodness of a virtual chain of dots. Because Bayesian theory is inferentially optimal, this finding suggests a "rational justification," and hence possibly an evolutionary rationale, for some of the rules of perceptual grouping.     

Organizational citizenship behavior and counterproductive work behavior: Do males and females differ?

While there has been considerable research on gender differences in core task performance, gender differences in organizational citizenship behavior (OCB) and counterproductive work behavior (CWB) have been largely ignored. Gender-consistent roles of females as being supportive would lead to the prediction that females engage in more OCB and less CWB than males. Using meta-analytic data gathered across 395 samples, we found several (weak) gender differences in CWB but none in OCB. We explain null and weak relationships from the perspective of social role theory, especially regarding males' roles being career-focused.     

A unified account of categorical effects in phonetic perception

Categorical effects are found across speech sound categories, with the degree of these effects ranging from extremely strong categorical perception in consonants to nearly continuous perception in vowels. We show that both strong and weak categorical effects can be captured by a unified model. We treat speech perception as a statistical inference problem, assuming that listeners use their knowledge of categories as well as the acoustics of the signal to infer the intended productions of the speaker. Simulations show that the model provides close fits to empirical data, unifying past findings of categorical effects in consonants and vowels and capturing differences in the degree of categorical effects through a single parameter.     

Functional connectivity dynamics during film viewing reveal common networks for different emotional experiences

Recent theoretical and empirical work has highlighted the role of domain-general, large-scale brain networks in generating emotional experiences. These networks are hypothesized to process aspects of emotional experiences that are not unique to a specific emotional category (e.g., “sadness,” “happiness”), but rather that generalize across categories. In this article, we examined the dynamic interactions (i.e., changing cohesiveness) between specific domain-general networks across time while participants experienced various instances of sadness, fear, and anger. We used a novel method for probing the network connectivity dynamics between two salience networks and three amygdala-based networks. We hypothesized, and found, that the functional connectivity between these networks covaried with the intensity of different emotional experiences. Stronger connectivity between the dorsal salience network and the medial amygdala network was associated with more intense ratings of emotional experience across six different instances of the three emotion categories examined. Also, stronger connectivity between the dorsal salience network and the ventrolateral amygdala network was associated with more intense ratings of emotional experience across five out of the six different instances. Our findings demonstrate that a variety of emotional experiences are associated with dynamic interactions of domain-general neural systems.     

The illumination of history

Formulations regarding the patient's history have not only played an important part in understanding the patient, but interpretations explicitly linking the present with the past have been seen as central to the therapeutic process. In this paper the author considers the role of historical reconstruction in bringing about psychic change. He emphasizes the therapeutic value that lies in the exploration of the way the patient's history is embodied in his internal object relationships, becoming manifested in the transference-countertransference relationship. The author presents clinical material which he suggests allowed the analyst to follow the way the patient's internal object relations, coloured by her history, became expressed and played out in the sessions. He suggests that, when these processes can be followed and addressed in the present, this may lead to a diminution in the underlying anxieties. This can thus promote psychic change by freeing the patient's capacity to achieve a sense of connection with her history, and to tolerate the meaning of what emerges, which illuminates both the present and the past.     

Change in emotional processing during a dialectical behavior therapy-based skills group for major depressive disorder

Across studies, paying attention to and analyzing one's emotions has been found to be both positively and negatively correlated with depression symptoms. One way of reconciling these seemingly contradictory findings is the possibility that attending to emotions in a skillful manner may help to reduce depression whereas attending to emotions with limited skill may be counterproductive. Dialectical behavior therapy (DBT) is a clinical intervention designed to foster adaptive awareness, expression, regulation, tolerance, and acceptance of emotions. Results of the present report come from a pilot study of a 16-week DBT-based skills training group for treatment-resistant major depressive disorder (MDD) as an adjunctive treatment to pharmacotherapy. Patients were randomized to treatment or a waitlist control group. A significant interaction revealed that increases in emotional processing were associated with decreases in depression symptoms in the DBT-based skills group; however, increases in emotional processing in the waitlist condition were associated with increases in depression. Results offer preliminary support for the idea that participating in DBT-based skills training may help individuals with treatment-resistant MDD to develop skills that facilitate processing emotions in a way that helps to reduce rather than exacerbate depression symptoms.     

Integrating the levels of person-environment fit: The roles of vocational fit and group fit

Previous research on fit has largely focused on person-organization (P-O) fit and person-job (P-J) fit. However, little research has examined the interplay of person-vocation (P-V) fit and person-group (P-G) fit with P-O fit and P-J fit in the same study. This article advances the fit literature by examining these relationships with data collected from 167 employees and their respective supervisors. As predicted, P-V fit related positively to both P-O and P-J fit, while P-O and P-J fit together fully mediated relations between P-V fit and outcome variables. Also as predicted, P-G fit moderated several relations of P-O and P-J fit with such outcome variables as in-role and extra-role performance. The article concludes with directions for future research on relations among these four different types of fit and implications for management practice.