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471.
In the present study the effects of task requirements were investigated using a same-different paradigm with geometric configurations as stimuli. Two conditions were employed: in the first, the instructions required the subjects to focus upon all dimensions of the stimuli; in the second, instead, the instructions required the subjects to attend only to some of the dimensions. The results show that in the first condition the subjects, in order to reach their decision, used a template- matching strategy, while in the second condition an analytic strategy was employed. 相似文献
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473.
Roberto Cabeza 《Psychonomic bulletin & review》1994,1(4):505-508
Subjects studied words in a classification task (to what categories does it belong?) or in a production task (producing associates to the word) and then completed one of two implicit memory tests—category association or free association. The classification study task and the category-association test emphasize categorical relations between concepts, and the production study task and the free-association test draw on associative relations. As predicted by the transfer-appropriate processing principle, priming in the category-association test was larger for words studied under the classification task than for those studied under the production task, whereas the opposite was true in the free-association test. This crossover dissociation is the first obtained between two implicit conceptual tests, and it provides support for the claim that it is necessary to distinguish between different types of conceptual processing. 相似文献
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475.
A new paradigm is proposed that involves a simple judgment on an object’s perceptual feature that is independent of object identity. Subjects were required to categorize as vertical or horizontal the main axis of elongation of an object picture. Both fake and real-world objects were presented, and a graphical manipulation was applied to their shapes so that the canonical elongation of the real-world objects was incongruent with the elongation of their shapes after the manipulation. The results showed an influence of the identity of the objects on the perceptual task in the form of a cost in judging the elongation of the incongruent real-world objects. The results are taken as evidence for automatic activation of objects’ stored representations. A “horse-race” model of the influence of these representations on the perceptual task is proposed in the final section of the article. 相似文献
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A method is described for computing the centre of mass (COM) from empirical estimates of the centre of pressure (COP) obtained by means of a force platform. The method is based on a biomechanical model of sway movements in quiet standing, according to which the horizontal acceleration of the COM is approximately proportional to the COM–COP difference. The equations are solved by approximating the solution with best fitting spline functions. The implications for movement control are discussed. 相似文献
478.
Roberto Colom María ngeles Quiroga Manuel Juan-Espinosa 《Personality and individual differences》1999,27(6):9
Sex differences in cognitive abilities were determined using the norms from two standardizations of the Differential Aptitude Test (DAT) and the Primary Mental Abilities (PMA) conducted between 1979 and 1995 in Spain. The standardized sex differences (ds) were computed separately for the DAT and the PMA subscales. Males scored higher in the DAT subscales Verbal Reasoning, Numerical Ability, Spatial Relations and Mechanical Reasoning, as well as in the PMA subscales Numerical Ability and Mental Rotation. Females scored higher in Inductive Reasoning (PMA-R) in the 1979 and 1995 standardizations. Taken together, these data do not support the hypothesis that cognitive sex differences are disappearing: there are still some differences favoring females and still some differences favoring males. 相似文献
479.
Three-Mode Factor Analysis (3MFA) and PARAFAC are methods to describe three-way data. Both methods employ models with components for the three modes of a three-way array; the 3MFA model also uses a three-way core array for linking all components to each other. The use of the core array makes the 3MFA model more general than the PARAFAC model (thus allowing a better fit), but also more complicated. Moreover, in the 3MFA model the components are not uniquely determined, and it seems hard to choose among all possible solutions. A particularly interesting feature of the PARAFAC model is that it does give unique components. The present paper introduces a class of 3MFA models in between 3MFA and PARAFAC that share the good properties of the 3MFA model and the PARAFAC model: They fit (almost) as well as the 3MFA model, they are relatively simple and they have the same uniqueness properties as the PARAFAC model.This research has been made possible by a fellowship from the Royal Netherlands Academy of Arts and Sciences to the first author. Part of this research has been presented at the first conference on ThRee-way methods In Chemistry (TRIC), a meeting of Psychometrics and Chemometrics, Epe, The Netherlands, August 1993. The authors are obliged to Age Smilde for stimulating this research, and two anonymous reviewers for many helpful suggestions. 相似文献
480.