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411.
This study addresses recent criticisms aimed at the interpretation of stereotype threat research and methodological weaknesses of previous studies that have examined race differences on Raven's Advanced Progressive Matrices (APM). African American and White undergraduates completed the APM under three conditions. In two threat conditions, participants received either standard APM instructions (standard threat) or were told that the APM was an IQ test (high threat). In a low threat condition, participants were told that the APM was a set of puzzles and that the researchers wanted their opinions of them. Results supported the stereotype threat interpretation of race differences in cognitive ability test scores. Although African American participants underperformed Whites under both standard and high threat instructions, they performed just as well as Whites did under low threat instructions.  相似文献   
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Recent cognitive models suggest that mental imagery can help us understand the maintenance of anxiety disorders (e.g., de Silva, 1986; Hackmann, Surawy, & Clark, 1998). However, imagery is relatively unexplored within agoraphobia. Such images are also thought to be useful in uncovering memories that occurred around the onset of a disorder (Hackmann, Clark, & McManus, 2000). A total of 20 patients with agoraphobia and 20 matched controls took part in this investigation. Participants described any recurrent images they experienced in agoraphobic situations, and also any associated memories. All patients with agoraphobia (but no control participants) reported having distinct recurrent images in “agoraphobic situations”. Most images involved several sensory modalities and in the majority of cases appeared to be linked with unpleasant memories of events experienced many years previously. While these exploratory findings require replication, potential treatment implications are discussed.  相似文献   
414.
Michael A. Day 《Erkenntnis》1990,33(3):285-296
In many applications of physics, boundary conditions have an essential role. The purpose of this paper is to examine from both a historical and philosophical perspective one such boundary condition, namely, the no-slip condition of fluid dynamics. The historical perspective is based on the works of George Stokes and serves as the foundation for the philosophical perspective. It is seen that historically the acceptance of the no-slip condition was problematic. Philosophically, the no-slip condition is interesting since the use of the no-slip condition illustrates nicely the use of scientific models. But more importantly, both the use and justification of the no-slip condition illustrate clearly how theories can holistically approach the world through model construction. Further, since much of the debate over scientific realism occurs in the realm of models, a case is made that an understanding of the role of the no-slip condition has something to offer to this debate.  相似文献   
415.
Current fertility patterns and expectations in many countries point to substantial future increases in the proportions of only children. While of undoubted social significance, demographically, will this development also be of social significance. psychologically? An answer was sought through analysis of voting records of members of the United States Congress relative to the number of their siblings: records pertaining to matters of genuine social significance and free of deficiencies characterizing data used in previous enquiries. The analysis clearly supported the null hypothesis that no socially significant behavioral differences exist between adult singletons and nonsingletons: or, as it happens, between those with but one sibling and those with two or more. If we are to become either concerned or pleased about an increase in the proportion of singletons in the population, it will apparently have to be on some grounds other than the existence of socially significant personality differences between such persons and the rest of the population.  相似文献   
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R C Day 《Sociometry》1971,34(3):303-327
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