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Strategies in probabilistic categorization: results from a new way of analyzing performance 下载免费PDF全文
Meeter M Myers CE Shohamy D Hopkins RO Gluck MA 《Learning & memory (Cold Spring Harbor, N.Y.)》2006,13(2):230-239
The "Weather Prediction" task is a widely used task for investigating probabilistic category learning, in which various cues are probabilistically (but not perfectly) predictive of class membership. This means that a given combination of cues sometimes belongs to one class and sometimes to another. Prior studies showed that subjects can improve their performance with training, and that there is considerable individual variation in the strategies subjects use to approach this task. Here, we discuss a recently introduced analysis of probabilistic categorization, which attempts to identify the strategy followed by a participant. Monte Carlo simulations show that the analysis can, indeed, reliably identify such a strategy if it is used, and can identify switches from one strategy to another. Analysis of data from normal young adults shows that the fitted strategy can predict subsequent responses. Moreover, learning is shown to be highly nonlinear in probabilistic categorization. Analysis of performance of patients with dense memory impairments due to hippocampal damage shows that although these patients can change strategies, they are as likely to fall back to an inferior strategy as to move to more optimal ones. 相似文献
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Avila MT Robles O Hong LE Blaxton TA Myers CS Wonodi I Gold J Thaker GK 《Journal of abnormal psychology》2006,115(4):771-778
Individuals with schizophrenia spectrum personality disorders (SSPD) and schizophrenia show similar cognitive impairments. The authors examined the contributions of SSPD symptoms and familial risk for schizophrenia to impairments on the Continuous Performance Test--Identical Pairs Version. Participants included 103 schizophrenia patients, 66 first-degree relatives (29 SSPD), and 103 community controls (26 SSPD) screened for family history of psychosis. Patients and SSPD relatives performed significantly worse than non-SSPD relatives and SSPD and non-SSPD community controls. No differences in performance were observed among non-SSPD relatives and SSPD and non-SSPD community controls. Results suggest a continuum in which risk for schizophrenia-related cognitive impairments is highest among patients and SSPD relatives, intermediate among non-SSPD relatives, and lowest among SSPD and non-SSPD community controls. Results suggest that SSPD in the absence of a family history of psychosis may be a phenocopy. 相似文献
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Neely LC Lakey B Cohen JL Barry R Orehek E Abeare CA Mayer W 《Journal of personality》2006,74(4):1015-1046
This study investigated the extent to which the link between perceived social support and affect reflected support recipients' trait perceived support as well as three distinct social processes: the objective supportiveness of providers, the unique relationships among recipients and providers that were stable over occasions, as well as the unique relationships that varied across occasions. Ten recipients interacted with each of the same four providers on five separate occasions, for a total of 200 interactions. Recipients and independent observers rated recipient affect and provider support. Greater perceived support was related to greater positive affect for recipients' trait perceived support, as well as for relationships that were stable over occasions and relationships that varied across occasions. No social support effects were found for negative affect. Perceived similarity was a consistent predictor of recipients' support perceptions. Implications for social support models and interventions were discussed. 相似文献
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Tracie L. Stewart Ioana M. Latu Ashley C. Myers 《Journal of experimental social psychology》2010,46(1):221-225
The present research investigated the effectiveness of a new technique for reducing automatic biases rooted in attribution theory - the Situational Attribution Training Technique. The goal of this strategy extends previous work by targeting the fundamental attributional pillars underlying automatic stereotyping. We aimed to circumvent the well-documented tendency for individuals to be overly reliant on dispositional attributions when perceiving negative stereotype-consistent behaviors performed by outgroup members. By teaching participants to consider situational attributions for such behaviors, we expected a reduction in outgroup stereotyping. Specifically, White participants were trained extensively to choose situational over dispositional explanations for negative stereotype-consistent behaviors performed by Black men. Across two experiments, participants who completed Situational Attribution Training demonstrated reduced automatic racial stereotyping on a person categorization task, relative to control participants who exhibited substantial automatic stereotyping. The implications of these findings for the nature and reduction of intergroup biases are discussed. 相似文献
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Greg Myers 《Science as culture》2013,22(3):474-479
The Scientific Voice, by Scott L. Montgomery, (New York and London: Guilford Press, 1996), 460 pages, $44.50 (cloth); $19.95 (paper) 相似文献
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The construct of alexithymia encompasses the characteristics of difficulty identifying feelings, difficulty describing feelings, externally oriented thinking, and a limited imaginal capacity. These characteristics are thought to reflect deficits in the cognitive processing and regulation of emotions and to contribute to the onset or maintenance of several medical and psychiatric disorders. In this article, we review recent methods for assessing alexithymia and examine how assessing alexithymia can inform clinical practice. Alexithymia is associated with heightened physiological arousal, the tendency to notice and report physical symptoms, and unhealthy compulsive behaviors. Alexithymic patients may respond poorly to psychological treatments, although perhaps not to cognitive-behavioral techniques, and it is unclear whether alexithymia can be improved through treatment. Interpretive problems regarding alexithymia include its overlap with other traits, whether it is secondary to illness or trauma, the possibility of subtypes, and low correlations among multiple measures. Nonetheless, we encourage the assessment of alexithymia in applied settings. 相似文献