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161.
162.
Observing responses, visual preferences, and habituation to visual stimuli in infants 总被引:1,自引:0,他引:1
L B Cohen 《Journal of experimental child psychology》1969,7(3):419-433
163.
164.
Dishabituation in Aplysia can involve either reversal of habituation or superimposed sensitization 总被引:2,自引:0,他引:2 下载免费PDF全文
Dishabituation has been thought to be due either to reversal of the process of habituation or to a second process equivalent to sensitization superimposed on habituation. One way to address this question is by testing whether dishabituation and sensitization can be dissociated. Previous studies using this approach in Aplysia have come to different conclusions about the nature of dishabituation, perhaps because those studies differed in many respects, including (1) whether they also observed transient behavioral inhibition, and (2) whether they used test stimuli that activated the LE siphon sensory neurons or as yet unidentified sensory neurons. To attempt to resolve the apparent contradictions between the previous studies, we have explored the importance of these two factors by performing a parametric study of dishabituation and sensitization of gill withdrawal in a simplified preparation that does not exhibit transient behavioral inhibition, using two different test stimuli that are known to activate the LE (Touch) or unidentified (Not Touch) sensory neurons. We find that dishabituation and sensitization in this preparation have similar time courses and generally similar functions of shock intensity. However, under one condition, with the Not Touch stimulus 2.5 min after the shock, dishabituation has a reverse effect of shock intensity. Additional analyses suggest that dishabituation with the Not Touch stimulus 2.5 min after the shock is due to reversal of habituation, whereas 12.5 min after the shock, dishabituation is due to superimposed sensitization. These results thus suggest that dishabituation may involve either process in the same preparation, and begin to define the conditions that favor one or the other. 相似文献
165.
Bishop SJ Cohen JD Fossella J Casey BJ Farah MJ 《Cognitive, affective & behavioral neuroscience》2006,6(1):62-70
Early studies of genetic effects on brain activity have been conducted to investigate primarily either the influence of polymorphisms
in dopaminergic genes, especially the catechol-O-methyltransferase (COMT) gene, on prefrontal cognitive processes such as working memory, or that of polymorphisms in the
serotonin transporter gene on the amygdala response to threatening stimuli. Here, we address genetic influences on the neural
systems underlying cognitive-affective interactions. Specifically, we assess the effect of the COMT val158met polymorphism on frontal regulation of attention under emotional distraction. Healthy volunteers were scanned while performing
a house-matching task with affectively negative versus neutral distractors. Effects of val allele load were examined on frontal
regions associated with attentional control and emotion regulation, and on parahippocampal regions associated with perception
of houses. As we predicted, val load correlated positively with activity in control- and task-related regions during performance
under emotional distraction. These findings provide an initial step toward identifying genetic contributions to interindividual
variability in recruitment of mechanisms that regulate affective processing. 相似文献
166.
Cohen M 《Psychoanalytic review》2006,93(3):501-4; author reply 505-9
167.
Pyszczynski T Abdollahi A Solomon S Greenberg J Cohen F Weise D 《Personality & social psychology bulletin》2006,32(4):525-537
Study 1 investigated the effect of mortality salience on support for martyrdom attacks among Iranian college students. Participants were randomly assigned to answer questions about either their own death or an aversive topic unrelated to death and then evaluated materials from fellow students who either supported or opposed martyrdom attacks against the United States. Whereas control participants preferred the student who opposed martyrdom, participants reminded of death preferred the student who supported martyrdom and indicated they were more likely to consider such activities themselves. Study 2 investigated the effect of mortality salience on American college students' support for extreme military interventions by American forces that could kill thousands of civilians. Mortality salience increased support for such measures among politically conservative but not politically liberal students. The roles of existential fear, cultural worldviews, and construing one's nation as pursing a heroic battle against evil in advocacy of violence were discussed. 相似文献
168.
The aim of this study was to examine the nature of the relationship between attentional dysfunction and social competence deficits in patients with schizophrenia. Attentional functioning, social perception, and social competence were assessed in 56 inpatients. Measures of vigilance and span of apprehension were administered to assess attentional functioning. Social perception was assessed with an audiovisual measure of affect recognition. Social competence was rated from a role-play task. Span of apprehension and auditory vigilance emerged as specific predictors of social competence. Affect recognition was tested as a mediator and a moderator of the relationship between attentional dysfunction and social competence. Affect recognition was found to moderate the relationship between span of apprehension and social competence. 相似文献
169.
The concept of acting intentionally is an important nexus where theory of mind and moral judgment meet. Preschool children's judgments of intentional action show a valence-driven asymmetry. Children say that a foreseen but disavowed side effect is brought about "on purpose" when the side effect itself is morally bad, but not when it is morally good. This is the first demonstration in preschoolers that moral judgment influences judgments of whether something was done on purpose (as opposed to judgments of purpose influencing moral judgment). Judgments of intentionality are usually assumed to be purely factual. That these judgments are sometimes partly normative-even in preschoolers-challenges current understanding. Young children's judgments regarding foreseen side effects depend on whether the children process the idea that the character does not care about the side effect. As soon as preschoolers effectively process the theory-of-mind concept "not care that P," children show the side-effect effect. 相似文献
170.
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