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251.
252.
We describe a custom-built feeder based on stepping motor technology controlled by a laboratory computer. The feeder dispenses
a wide range of foods: any fruit, vegetable, or nut. The feeder allows the investigator to reward monkeys with different foods
within a single experimental day. The monkey’s motivation to perform tasks is high and does not rely upon food regulation.
The avoidance of regulation, as well as the palatability and variety of the rewards dispensed by our device, distinguishes
it from commercially available products. We also describe the use of the feeder in the context of novel behavioral and neurophysiological
studies in freely moving monkeys. 相似文献
253.
Abstract The main objective of this study is to test the effects over time of three role stress variables (role conflict, role ambiguity and role overload) on the three burnout dimensions (emotional exhaustion, depersonalization and personal accomplishment). Based on theoretical models on burnout and on meta-analytical research, it is hypothesized that the three role stress variables will predict changes over time in emotional exhaustion and depersonalization, but not in personal accomplishment. The results obtained by means of hierarchical regression analysis partially support the hypothesis. The three role stress variables predict emotional exhaustion over time. Role conflict and role overload predict depersonalization over time. Finally, contrary to expectations, role ambiguity predicts personal accomplishment over time. 相似文献
254.
三种常用DIF检测方法的比较研究 总被引:6,自引:1,他引:5
本研究在对DIF作出新的更为严格的界定、对三种常用的DIF检澍方法进行详细介绍的基础上.以1999年高考英语试卷75道选择题为研究材料,对三种常用的DIF检测方法进行了实证研究。结果表明:MH方法与SIBTEST方法检测的敏感性较STND方法高;MH方法与SIBTEST方法检出的一致性很高;SIBTEST方法具有较好的性能,在实际应用中可以作为首选的方法;在进行DIF检测时,样本容量在1000左右为宜。 相似文献
255.
Mental fatigue influence on effort-related cardiovascular response: difficulty effects and extension across cognitive performance domains 总被引:2,自引:0,他引:2
Rex A. Wright Tonia R. Junious Christin Neal Ashley Avello Candace Graham Laura Herrmann Sonia Junious Natasha Walton 《Motivation and emotion》2007,31(3):219-231
Two experiments investigated cardiovascular effects of mental fatigue as a function of (1) the difficulty of the cognitive
challenge with which participants were confronted, and (2) the relevance of that challenge to the activity that instigated
the fatigue. In the first, participants performed an easy (fatigue low) or difficult (fatigue high) counting task and then
were presented an arithmetic challenge (task B relevance high) or a scanning challenge (task B relevance low) with instructions
that they would avoid a noise if they attained a modest performance standard. Analysis of blood pressure responses assessed
during the work periods revealed fatigue main effects, reflecting stronger responses for High Fatigue participants, regardless
of the character of the second task. In the second, the procedure was the same except that it included a high performance
standard and provided the chance to win a prize. Analysis of the pressure data revealed fatigue x work period interactions,
reflecting relatively stronger responses among High Fatigue participants in work period 1, but relatively weaker responses
among these participants in work period 2. Results confirm previous findings and support an analysis of fatigue influence
on effort and associated cardiovascular responses. They also argue against the idea that mental fatigue influence may be confined
to relevant cognitive performance realms.
相似文献
Rex A. WrightEmail: |
256.
Devilly GJ Ciorciari J Piesse A Sherwell S Zammit S Cook F Turton C 《Psychological science》2007,18(3):212-217
The current article presents two studies that aimed to replicate DePrince and Freyd's (2001, 2004) studies demonstrating that high and low dissociators differentially recall neutral and trauma words under conditions of varying cognitive load. We did not find this effect. This lack of replication was apparent for both free recall and word recognition memory and in both studies. In effect, we found little evidence to support betrayal trauma theory, yet observed increased memory fallibility, as demonstrated by lower general recall and (in one study) commission errors, in high dissociators. 相似文献
257.
258.
资源两难问题的研究及其新进展 总被引:1,自引:0,他引:1
作为多人社会两难问题的基本范式之一,近年来资源两难问题引起了包括社会学家、经济学家和心理学家在内诸多领域研究者越来越多的关注。文章介绍了资源两难问题的定义、特点、研究意义并总结了以往的研究成果,着重介绍了Samuelson和Messick于1994年提出的资源两难决策模型。在此基础上进一步指出以往研究存在的一些不足,如忽视了对不确定性的研究等。文章最后指出了近年来有关资源两难问题的研究在心理学界的发展,并提出了对以后研究的一些建议。 相似文献
259.
荀子“刑”、“德”思想自有其独特的学术品格,但溯其源流,大抵远绍周公“明德慎罚”思想,近承孔子“为政以德”、“先教后诛”思想,下启董仲舒“德主刑辅”思想,诸多思想与表述甚至直接袭用《尚书》等书、引证孔子等语录事迹,在先秦儒家刑德思想发展系统中是不可或缺的重要一环。 相似文献
260.
Several findings relate the hippocampal formation to the behavioural consequences of stress. It contains a high concentration of corticoid receptors and undergoes plastic modifications, including decreased neurogenesis and cellular remodelling, following stress exposure. Various major neurotransmitter systems in the hippocampus are involved in these effects. Serotonin (5-HT) seems to exert a protective role in the hippocampus and attenuates the behavioural consequences of stress by activating 5-HT1A receptors in this structure. These effects may mediate the therapeutic actions of several antidepressants. The role of noradrenaline is less clear and possibly depends on the specific hippocampal region (dorsal vs. ventral). The deleterious modifications induced in the hippocampus by stress might involve a decrease in neurotrophic factors such as brain derived neurotrophic factor (BDNF) following glutamate N-methyl-D-aspartate (NMDA) receptor activation. In addition to glutamate, nitric oxide (NO) could also be related to these effects. Systemic and intra-hippocampal administration of nitric oxide synthase (NOS) inhibitors attenuates stress-induced behavioural consequences. The challenge for the future will be to integrate results related to these different neurotransmitter systems in a unifying theory about the role of the hippocampus in mood regulation, depressive disorder and antidepressant effects. 相似文献