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排序方式: 共有263条查询结果,搜索用时 15 毫秒
171.
In task switching, response repetitions typically lead to performance benefits for task repetitions but costs for task switches. We examined whether this cost–benefit pattern is affected by response discriminability (RD), varying (a) the anatomical response separation (within-hand vs. between-hand responses) and (b) the spatial separation (close vs. far response keys). We assumed that anatomical RD increases response competition generally, whereas spatial RD increases the salience of left–right coding and thus facilitates response selection. In two experiments, we found that spatial RD increased the response-repetition costs in task switches but similarly decreased the response-repetition benefit in task repetitions. The effect of spatial RD was response-specific but did not interact with task switching. This data pattern is consistent with a recent account that proposed that facilitated response selection increases response “self-inhibition” after response execution. In contrast, the influence of anatomical RD primarily consisted of an overall increase of reaction-time level in all conditions, whereas error rates decreased, suggesting a general shift in response criterion. Taken together, the data suggest that a self-inhibition mechanism on the level of motor response codes contributes to response-repetition effects in task switching, which is possibly independent of task-specific mechanisms of strengthening of associations. 相似文献
172.
Using a dual-task methodology we examined the interaction of perceiving and producing facial expressions. In one task, participants were asked to produce a smile or a frown (Task 2) in response to a tone stimulus. This auditory-facial task was embedded in a dual-task context, where the other task (Task 1) required a manual response to visual face stimuli (visual-manual task). These face stimuli showed facial expressions that were either compatible or incompatible to the to-be-produced facial expression. Both reaction times and error rates (measured by facial electromyography) revealed a robust stimulus–response compatibility effect across tasks, suggesting that perceived social actions automatically activate corresponding actions even if perceived and produced actions belong to different tasks. The dual-task nature of this compatibility effect further testifies that encoding of facial expressions is highly automatic. 相似文献
173.
Sharman SJ 《Experimental psychology》2011,58(5):361-369
To investigate whether people show retrieval-induced forgetting (RIF) for bizarre and familiar actions that they performed or observed, three experiments were conducted. In Experiment 1, participants performed bizarre and familiar actions with different objects during learning (e.g., pencil: balance the pencil across the cup, sharpen the pencil). They repeatedly performed a set of the bizarre or familiar actions during retrieval practice. After a distracter task, participants' cued recall was tested. Participants showed RIF for both bizarre and familiar actions. In Experiment 2, half of the participants performed the bizarre and familiar actions themselves; the other half observed the experimenter performing the actions. Replicating the results of Experiment 1, participants who performed the actions showed RIF for bizarre and familiar actions. In contrast, participants who observed the actions did not show RIF for either action type. Experiment 3 examined whether this lack of RIF for observed actions occurred due to a lack of active recall during retrieval practice; it did. Overall, the three experiments demonstrated RIF for both bizarre and familiar performed and observed actions. A distinctiveness account of the results is provided. 相似文献
174.
Becker SI Folk CL Remington RW 《Journal of experimental psychology. Human perception and performance》2010,36(6):1460-1476
On the contingent capture account, top-down attentional control settings restrict involuntary attentional capture to items that match the features of the search target. Attention capture is involuntary, but contingent on goals and intentions. The observation that only target-similar items can capture attention has usually been taken to show that the content of the attentional control settings consists of specific feature values. In contrast, the present study demonstrates that the top-down target template can include information about the relationship between the target and nontarget features (e.g., redder, darker, larger). Several spatial cuing experiments show that a singleton cue that is less similar to the target but that shares the same relational property that distinguishes targets from nontargets can capture attention to the same extent as cues that are similar to the target. Moreover, less similar cues can even capture attention more than cues that are identical to the target when they are relationally better than identical cues. The implications for current theories of attentional capture and attentional guidance are discussed. 相似文献
175.
Stefanie B. Siegmund 《Jewish History》2002,16(1):73-106
Tuscan notarial acts permit the exploration of the often elusive relationship of Jewish practice, Jewish law and the corresponding laws of the state. One issue in early modern Italian Jewish marriage negotiations was the eventual disposition of the dowry of a childless wife who predeceased her husband. Jewish law on the succession of the childless woman was complicated by traditional or regional customs and communal ordinances. Moreover, in sixteenth-century Tuscany there was no official code, court or arbiter of Jewish law. Nonetheless, Christian notaries who wrote pre-nuptial stipulations or pacts for Jews worked with the assumption that Jews were allowed to live according to their own law. This essay argues that individual Jews used to advantage the state's assumption that they could follow Jewish law (despite the absence of any universally-acknowledged or applicable law on this specific subject) by employing notaries to write contracts in disregard of both local statutes and well-known Jewish customs. In the second part of this essay I locate the stipulations in the Jewish marriage system and suggest that the process of negotiation over the fate of the dowry was integrally related to the system's emphasis – in contrast to that of contemporary Christians – on universal marriage and procreation. 相似文献
176.
Fowler JC Ackerman SJ Speanburg S Bailey A Blagys M Conklin AC 《Journal of personality assessment》2004,83(3):306-322
In this study, we examined global treatment outcomes during 16 months of intensive, psychodynamic treatment for 77 inpatients suffering from treatment-refractory disorders. Hypotheses based on the phase model of treatment change (Howard, Lueger, Maling, & Martinovich, 1993; Howard, Moras, Brill, Martinovich, & Lutz, 1996) were supported in the study results. Diagnostic and Statistical Manual of Mental Disorders (4th ed.; American Psychiatric Association, 1994) Axis V scales assessing behavioral functioning demonstrated large and medium effect size change, whereas stable, enduring personality functioning assessed by psychoanalytic Rorschach scales and the Social Cognition and Object Relations Scale (Westen, 1995) for the Thematic Apperception Test (Murray, 1943) demonstrated small and medium effect size change. We also report assessment of reliable change index and clinical significance. The ecological validity of Rorschach measures is supported by significant validity coefficients (in the hypothesized directions) between implicit measures of personality functioning and behavioral ratings. 相似文献
177.
When humans are exposed to external forces while performing arm movements, they adapt by compensating for these novel forces. The basis of this learning process is thought to be a neural representation that models the relation between all forces acting upon the system and the kinematic effects they produce, called inverse dynamic model (IDM). The present study investigated whether and how the predictability of a given external force affects the selection of an appropriate motor response to compensate for such force. Adult human subjects (N=32) held a handle that could rotate around the elbow joint and learned to perform goal-directed forearm flexion movements, while an external velocity-dependent negative damping force was applied that assisted forearm movement. Subjects were randomly assigned to two groups. In the associative group, the applied damping force was always associated with a specific initial position. Thus, after initial learning, the force application became predictable. In the non-associative group, where the same movements were performed, the applied force was independent of the initial position, so that no association between force and location could be formed. We found that only the associative group significantly reduced target error when damping was present. That is, the location cue aided these subjects in generating dynamic responses in the appropriate limb. Our results indicate that motor adaptation to different dynamic environments can be facilitated by indicative stimuli. 相似文献
178.
The role of primary and secondary control in adaptation to age-related vision loss: a study of older adults with macular degeneration 总被引:2,自引:0,他引:2
This study examines the effect of primary and secondary control on 3 major outcomes experienced by visually impaired older adults, that is, functional ability, adaptation to vision loss, and positive affect. The authors' theoretical model is based on the J. Heckhausen and R. Schulz (1995) control framework, as well as a conceptual integration of these outcomes, and they hypothesized that control beliefs can substantially contribute to explaining interindividual differences in these outcomes. A path model applied to data from a sample (N = 90) of visually impaired older adults, suffering from age-related macular degeneration, the major cause of vision loss in old age, generally supports this expectation. 相似文献
179.
The current work investigated the effects of social influence on children's recall accuracy and metacognitive monitoring. Two studies were conducted in which 8- and 10-year-olds were confronted with postevent information in an interview situation. An interviewer (Study 1) or a confederate (Study 2) provided postevent information with two levels of assertiveness, inducing (a) a variation of conformity pressure and (b) a variation of information credibility. Afterwards, children's confidence judgments were assessed. The results revealed significant age differences in children's ability to adequately cope with variations of social influence. Although conformity pressure was especially important for the 8-year-olds, effects of informative social influence were independent of age. However, 10-year-olds were also able to act appropriately on low credibility, thereby demonstrating a more sophisticated consideration of social influence sources. Moreover, varying assertiveness also affected the quality of children's confidence judgments by improving their metacognitive differentiation skills. 相似文献
180.
Reference to oneself during incidental learning of words frequently results in better recall performance than reference to other persons. However, this effect occurs under different conditions with differing strength, and sometimes it is even reversed. Meta-analyses and further experimental studies suggest that increased recall performance under a self-referential encoding task occurs only if it is compared with a nonintimate other person and if abstract material is presented, irrespective of the type of previously presented words (adjectives or nouns). In the current paper, two experiments are reported which support the assumption that this intimacy effect on memory only occurs if no pictorial or concrete features of the material (nouns) to be learned can be exploited for an improvement in encoding or remembering the material. All results agree with predicted effect sizes, which were drawn from a meta-analysis and subsequently conducted experimental studies. This suggests that a recall advantage of referring to oneself compared to other persons is subordinate to the effects of concreteness or imageability. Moreover, the current results offer a theoretical explanation of some previously reported but nevertheless puzzling results from imagery instructions, which indicate decreased recall performance for self-reference compared to other-reference. 相似文献