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In order to investigate lateral asymmetry in tactile perception, two or four fingers of normal primary school children were touched sequentially. Stimulation was either unimanual or bimanual and either verbal or nonverbal responses were required. Right hand advantage was demonstrated subsequent to uni- and bimanual stimulation in both the verbal and nonverbal response conditions. Neither an age nor a sex effect on laterality was found. Right hand advantage was affected by direction of stimulation in the bimanual condition. Left hemispheric dominance was argued to be related to the temporal nature of the tasks. 相似文献
74.
Otto P. van Driel 《Psychometrika》1978,43(2):225-243
In the applications of maximum likelihood factor analysis the occurrence of boundary minima instead of proper minima is no exception at all. In the past the causes of such improper solutions could not be detected. This was impossible because the matrices containing the parameters of the factor analysis model were kept positive definite. By dropping these constraints, it becomes possible to distinguish between the different causes of improper solutions. In this paper some of the most important causes are discussed and illustrated by means of artificial and empirical data.The author is indebted to H. J. Prins for stimulating and encouraging discussions. 相似文献
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This research was devoted to the studv of minoritv influence in a context of originality of judgments. It was stimulated by a consideration of the role pla-ved by the normative context in influence processes. In most research, this implicitlv underlies the phenomena studied. Thus, studies of social control have naturally appealed to the objectivity context. Innovation, in the social milieu in which it is involved, frequentlv implies an originality context. We hoped to study experimentally its effects on the process of social change. To this end, five experimental conditions were created, in which the originality norm was introduced in different ways – by experimental instructions, by influencing the perception of his own creativity by each individual and by using the time factor to encourage the fuller acceptance of this norm. In each condition, a consistent minority defended a deviant response in a colour perception task (the experimental paradigm used in our previous research using an objectivity context). The originality context affected the development of minority influence. Judgment based on perceptual evidence was abandoned to a significant degree, and new influence behaviours appeared. Individuals followed the minority or avoided the conflict by apparently original compromise responses. They were able to adopt several modes of response in the destructured way during the experiment, as they could oppose the minority by adopting a counter-norm. Although these reactions depended on the way in which the originality norm was introduced, theprimary role in this process was nevertheless played by the minority, which provided the pole of attraction and persuasion in the group. 相似文献
77.
Paul M.G. Emmelkamp Mieke van der Helm Berendien L. van Zanten Ivo Plochg 《Behaviour research and therapy》1980,18(1):61-66
Fifteen obsessive-compulsive patients were given treatment consisting of ten sessions of gradual exposure in vivo. For half of the patients gradual exposure in vivo was preceded by self-instructional training.Treatment resulted in significant improvement on anxiety and avoidance scales, Leyton Obsessional Inventory, Self-rating Depression Scale and on ratings for anxious mood and depression. Neither the post-test nor the follow-ups 1 month and 6 months later indicated a difference between the effects of the two conditions. Self-instructional training did not enhance the effectiveness of gradual exposure in vivo. 相似文献
78.
Richard A. van den Pol Brian A. Iwata Martin T. Ivancic Terry J. Page Nancy A. Neef F. Paul Whitley 《Journal of applied behavior analysis》1981,14(1):61-69
This study examined classroom-based instruction in restauranting skills for handicapped persons. Three male students were taught each of four skill components in sequential order: locating, ordering, paying, and eating and exiting. Training was implemented in a multiple baseline design across subjects and consisted of modeling and role playing in conjunction with photo slide sequences and a simulated ordering counter. The use of a menu containing general item classes and a finger matching procedure for identifying errors in the delivery of change greatly reduced the reading and math skills necessary to enter and complete the program. Periodic probes were conducted in a McDonald's restaurant prior to, during, and up to one-year following the termination of training. In addition, two probes (overt and covert observation) were conducted in a Burger King restaurant to assess further generalization to a location different from the one depicted throughout training. Results showed that students' performance on restaurant probes improved as a result of training, generalized to novel settings, maintained over an extended period of time, and was comparable to that of a normative sample of nonretarded persons. 相似文献
79.
Comparison of the magnitude and intrinsic spread of foveal diplopia thresholds with the accuracy of ocular alignment as determined with a subjective alignment method shows that: the accuracy of alignment in the vertical direction (within 1–2 min) is remarkably good and much better than in the horizontal direction; the largest disparities occurring due to restricted alignment accuracy are usually substantially smaller than the foveal diplopia thresholds; interindividual variability in the magnitude of foveal diplopia thresholds is not due only to interindividual variability in the alignment accuracy; and the spread of foveal diplopia thresholds exceeds the spread of ocular alignment, which implies that the noise in the foveal disparity domain is not only due to the restricted alignment accuracy but also to sensory processes. Finally, the data confirm that, unlike the case with diplopia thresholds, the spread of stereoscopic thresholds is not affected by the restricted alignment accuracy. 相似文献
80.
A linear utility model is introduced for optimal selection when several subpopulations of applicants are to be distinguished. Using this model, procedures are described for obtaining optimal cutting scores in subpopulations in quota-free as well as quota-restricted selection situations. The cutting scores are optimal in the sense that they maximize the overall expected utility of the selection process. The procedures are demonstrated with empirical data. 相似文献