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521.
In the centennial year of the birth of Hans Selye, this review compares his classical concepts of stress with a modern approach to mechanisms of CNS arousal. Relations between the two concepts are described. Neuroanatomical, neurophysiological, and functional genomic mechanisms underlying CNS arousal are briefly reviewed. Controls over stress responses and arousal are compared to particular concepts of control system engineering. Understanding these two systems is of crucial importance because their dysregulation is associated with large numbers of disease states. 相似文献
522.
We find a spatially asymmetric allocation of attention in patients with traumatic brain injury (TBI) despite the lack of obvious asymmetry in neurological indicators. Identification performance was measured for simple spatial patterns presented briefly to a locus 5 degrees into the left or right hemifield, after precuing attention to the same (ipsilateral) or opposite (cross-hemifield) side. Though the cue was non-predictive of target location overall, performance was significantly slower for cross than for ipsilateral trials in both patients and controls. We tested 21 TBI patients without overt focal brain damage and nine control subjects. Only patients demonstrated significantly worse performance for left side presentation in the ipsilateral condition. Furthermore, in the cross-hemifield condition, the left-right difference seen in TBI patients was significantly larger-reflecting a failure in producing a leftward attention shift. Again no significant difference was found in controls. These hemifield effects suggest an asymmetry in the ability of TBI patients in shifting attention to the left hemifield, whether from central fixation or from a cue in the contra-lateral hemifield. The results support basic hypotheses regarding visual attention: Attentional control may be asymmetric and attention may be a distributed, rather than localized cortical function. 相似文献
523.
Encoding under trust and distrust: the spontaneous activation of incongruent cognitions 总被引:1,自引:0,他引:1
Past studies of strategic thinking have shown that the encoding of the message information becomes more complex under distrust. Receivers process the information as if they are trying to protect themselves from being misled by testing alternative potential interpretations. The present study investigates the possibility that when people are mistrustful they spontaneously activate associations that are incongruent with the given message. Findings from 3 experiments suggest that, even when the distrust is unrelated in any meaningful way to the message and even when receivers are unable to prepare a strategic response, the cognitive system reacts to distrust by automatically inducing the consideration of incongruent associations--it seems designed to ask, "and what if the information were false?" The theoretical implications of the results for theories of social perception and persuasion are discussed. 相似文献
524.
Kennedy EP 《Proceedings of the American Philosophical Society》2003,147(1):67-72
Konrad Bloch was a man of strong ethical principles. In personality, he was soft-spoken, kind, and generous. His home in Lexington, Massachusetts, with Lore, his wife of more than sixty years, his daughter, Susan, and son, Peter, was at the center of a joyous family life. 相似文献
525.
Bragger JD Hantula DA Bragger D Kirnan J Kutcher E 《The Journal of applied psychology》2003,88(1):6-14
The effects of feedback equivocality, information availability, and prior decision-making history on escalation and persistence were investigated. Replicating the findings of J.L. Bragger, D.H. Bragger, D.A. Hantula, and J.P. Kirnan (1998), this study found that participants receiving equivocal feedback on their decisions invested more money and invested across more opportunities; those who could purchase information invested fewer resources than did participants who did not have the opportunity to purchase information. There was an inverse linear relationship between the percentage of opportunities in which participants purchased information and the delay to exit decisions and total resources invested. Six weeks earlier, some participants took part in a more profitable investment scenario, and prior experience led to later increased investing when participants were faced with failure, even above that invested in a preceding, succeeding scenario. These results are consistent with an equivocality theory account of escalation. 相似文献
526.
Student prejudice against gay male and lesbian lecturers 总被引:1,自引:0,他引:1
The authors examined whether gay men and lesbians are evaluated more negatively than individuals of unspecified sexual orientation when attributional ambiguity surrounds evaluations and whether they are evaluated similarly to unspecified others when no attributional ambiguity is present. One male and one female lecturer delivered either a strong or a weak lecture to students who either (a) believed that the lecturer was a gay man or a lesbian or (b) did not receive sexual orientation information. Contrary to predictions, the quality of the lecture did not influence the ratings of known gay male and lesbian lecturers, although lecture quality strongly influenced ratings of lecturers whose sexual orientation was unspecified. After strong lectures, participants rated known gay male and lesbian lecturers more negatively than they did lecturers whose sexual orientation was unspecified. After weak lectures, participants rated known gay male and lesbian lecturers more positively than they did the others. The authors discussed the possibility that students might moderate their ratings to avoid discriminating against gay and lesbian lecturers. 相似文献
527.
528.
Executive Function and the Frontal Lobes: A Meta-Analytic Review 总被引:7,自引:0,他引:7
Currently, there is debate among scholars regarding how to operationalize and measure executive functions. These functions generally are referred to as “supervisory” cognitive processes because they involve higher level organization and execution of complex thoughts and behavior. Although conceptualizations vary regarding what mental processes actually constitute the “executive function” construct, there has been a historical linkage of these “higher-level” processes with the frontal lobes. In fact, many investigators have used the term “frontal functions” synonymously with “executive functions” despite evidence that contradicts this synonymous usage. The current review provides a critical analysis of lesion and neuroimaging studies using three popular executive function measures (Wisconsin Card Sorting Test, Phonemic Verbal Fluency, and Stroop Color Word Interference Test) in order to examine the validity of the executive function construct in terms of its relation to activation and damage to the frontal lobes. Empirical lesion data are examined via meta-analysis procedures along with formula derivatives. Results reveal mixed evidence that does not support a one-to-one relationship between executive functions and frontal lobe activity. The paper concludes with a discussion of the implications of construing the validity of these neuropsychological tests in anatomical, rather than cognitive and behavioral, terms. 相似文献
529.
Mahon EJ 《The Psychoanalytic quarterly》2005,74(4):1053-1068
An analysand used the word repress in a dream in an unusual way. In the dream, a record had been re-pressed: it was not the original disc but a copy. This manifest meaning of the word led associatively to more latent meanings. A kind of dialectical process ensued whereby, whenever the concept of repression came up, several meanings had to be considered to set the record straight. The classical way of thinking about repression had been augmented a little by this novel meaning that the analysand had stumbled on in his dream. Psychoanalytic process was enriched by this ongoing scrutiny of repression in theory and practice. 相似文献
530.
Mathes EW 《Psychological reports》2005,96(1):29-35
In a classic study, Buss, Larson, Westen, and Semmelroth reported that men were more distressed by the thought of a partner's sexual infidelity (sexual jealousy) and women were more distressed by the thought of a partner's emotional infidelity (emotional jealousy). Initially, Buss and his associates explained these results by suggesting that men are concerned about uncertainty of paternity, that is, the possibility of raising another man's child while believing the child is their own. However, later they explained the results in terms of men's preference for short-term sexual strategies. The purpose of this research was to test the explanation of short-term sexual strategies. Men and women subjects were instructed to imagine themselves in a relationship which was either short-term (primarily sexual) or long-term (involving commitment) and then respond to Buss's jealousy items. It was hypothesized that, when both men and women imagined a short-term relationship, they would be more threatened by a partner's sexual infidelity, and, when they imagined a long-term relationship, they would be more threatened by a partner's emotional infidelity. Support was found for this hypothesis. 相似文献