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121.
Sixteen healthy young adults (ages 18-32) and 16 healthy older adults (ages 67-81) completed a delayed response task in which they saw the following visual sequence: memory stimuli (2 abstract shapes; 3,000 ms), a blank delay (5,000 ms), a probe stimulus of variable duration (one abstract shape; 125, 250, 500, 1,000, or 2,000 ms), and a mask (500 ms). Subjects decided whether the probe stimulus matched either of the memory stimuli; they were instructed to respond during the mask, placing greater emphasis on speed than accuracy. The authors used D. L. Hintzman & T. Curran's (1994) 3-parameter compound bounded exponential model of speed-accuracy tradeoff to describe changes in discriminability associated with total processing time. Group-level analysis revealed a higher rate parameter and a higher asymptote parameter for the young adult group, but no difference across groups in x-intercept. Proxy measures of cognitive reserve (Y. Stern et al., 2005) predicted the rate parameter value, particularly in older adults. Results suggest that in working memory, aging impairs both the maximum capacity for discriminability and the rate of information accumulation, but not the temporal threshold for discriminability. 相似文献
122.
The devastating terror attacks of 11 September 2001 have often been characterized as a "bolt from the blue." Drawing inspiration from the political psychological literature on strategic surprise, this article poses the deceptively simple question of why so many U.S. policymakers were caught so woefully off guard last year. Through a preliminary empirical exploration of three broad explanatory "cuts" derived from the relevant interdisciplinary literature—psychological, bureau–organizational, and agenda–political—the authors seek to shed light on the sources of failure that may have contributed to 9/11 and point to promising avenues of investigation for future research as the available empirical record becomes more complete. 相似文献
123.
124.
David G. Stern 《Synthese》1994,98(3):415-458
While Wittgenstein wrote unconventionally and denied that he was advancing philosophical theses, most of his interpreters have attributed conventional philosophical theses to him. But the best recent interpretations have taken the form of his writing and his distinctive way of doing philosophy seriously. The 1980s have also seen the emergence of a body of work on Wittgenstein that makes extensive use of the unpublished Wittgenstein papers. This work on Wittgenstein's method and his way of writing are the main themes of this literature review.Section 1 surveys Wittgenstein's conception of philosophical method and its reception. Section 2 is a review of recent work on rule-following and the methodological issues it raises. Section 3 concerns research on the WittgensteinNachlass and its implications for the interpretation of his philosophy. 相似文献
125.
Leonard D. Stern 《Memory & cognition》1981,9(3):247-262
Six theories of human amnesia are examined. Each is categorized according to the processing ability that is conceived to underlie the amnesic deficit. The theories fall into one of four categories: consolidation, retrieval, semantic encoding, and context encoding deficit theories. The recently proposed context encoding deficit theories are found to offer the most satisfactory account of the human amnesic syndrome. It is suggested that the other theoretical approaches are best viewed as special cases of these context encoding deficit theories. 相似文献
126.
Gary S Stern Daniel P Blyth Maria W Kreye Cecilia E Coons 《Journal of research in personality》1975,9(1):37-47
As determined by their scores on Rotter's Locus of Control scale (Psychological Monographs, 1966, 80 (1, Whole No. 609)), internal and external subjects were exposed either to a high-, low-, or no-fear message on the dangers of exposure to a sunlamp. It was recommended to half the subjects in each condition that they apply a cream which was described as producing minimal skin irritation (low aversiveness), while half the subjects received recommendations to apply a cream described as producing considerable skin irritation (high aversiveness). It was predicted that (a) a high-fear message would be more effective than a low-fear message in getting subjects to use the cream, especially when the recommended behavior was perceived as low in aversivensss; and (b) a high-fear message would be more effective than a low fear message for subjects classified as internals. The second prediction was confirmed, and the first was tentatively supported. Results were interpreted in terms of the perceptual processes which may mediate the relationship between fear and action. The findings did not support the fear-drive model. 相似文献
127.
Nonhyperactive and clinically defined hyperactive boys were administered reading tasks under quiet and distracting conditions. Hyperactive boys were less attentive to task relevant stimuli and more attentive to task irrelevant stimuli than their controls. Our results demonstrate that the previous findings of inattentiveness among hyperactive boys on laboratory tasks can be generalized to more typical school activities such as reading. 相似文献
128.
Direction of rotation and static slant judgments were collected for a series of outline plane forms in four experiments with 106 subjects. Direction was judged more accurately for forms displaying the same perspective gradients as trapezoids, but with right-angled contours, than for trapezoids. There were no consistent differences among these forms in judged slant. Direction of rotation judgments were affected by a static false interposition cue, with interposition increasing the proportion of veridical judgments when placed in conflict with a relative size gradient and decreasing this proportion when a size gradient was absent. Both a dynamic factor (contour angle change) and a static factor (misperceived relative distance of the vertical sides) were found to affect perceived direction of rotation, with direction judgments based primarily on the dynamic factor. 相似文献
129.
Eye movement patterns in four atypical text formats were examined. Regressive eye movements were a sensitive indicator of reading disruption due to the textual manipulations of type (all capitals vs unusual) and margin (justification vs nonjustification). The capitals nonjustified format was easiest to read while the unusual justified format was most difficult. Reading speed was a less sensitive measure than regressions. 相似文献
130.