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211.
On the partitioning of squared Euclidean distance and its applications in cluster analysis 总被引:1,自引:0,他引:1
The partitioning of squared Eucliean distance between two vectors in M-dimensional space into the sum of squared lengths of vectors in mutually orthogonal subspaces is discussed and applications given to specific cluster analysis problems. Examples of how the partitioning idea can be used to help describe and interpret derived clusters, derive similarity measures for use in cluster analysis, and to design Monte Carlo studies with carefully specified types and magnitudes of differences between the underlying population mean vectors are presented. Most of the example applications presented in this paper involve the clustering of longitudinal data, but their use in cluster analysis need not be limited to this arena. 相似文献
212.
Positive and negative social ties among older adults: Measurement models and the prediction of psychological distress and well-being 总被引:5,自引:0,他引:5
John F. Finch Morris A. Okun Manuel Barrera Jr. Alex J. Zautra John W. Reich 《American journal of community psychology》1989,17(5):585-605
The factor structure of positive and negative social ties was studied among 246 older adults who were either recently physically disabled, recently conjugally bereaved, or matched controls. Covariance structure analyses were carried out on a network measure to determine whether positive and negative social ties represent independent domains of social experience, and to assess the degree to which their structure is invariant across groups undergoing major loss transitions. Positive and negative social ties were found to be independent and there was substantial similarity in their factor structure across the three groups. Hierarchical regression analyses revealed that, whereas positive social ties were related to psychological well-being, negative social ties were predictive of both psychological well-being and distress. These results demonstrate the importance of assessing both positive and negative ties in explaining the psychological adjustment of older adults. 相似文献
213.
Charles W. Eriksen Nancy Morris Yei -Yu Yeh William O’hara Robert T. Durst 《Attention, perception & psychophysics》1981,30(4):375-385
Bjork and Murray (1977) have presented a feature-specific interactive channels model that predicts perceptual interference between letters presented simultaneously in visual displays. Maximum interference is predicted when a target letter is presented with an identical letter. In their experiment, Bjork and Murray found support for their model, but their results could have occurred artifactually from response biases of their subjects. Santee and Egeth (1980) used a different paradigm that eliminated the possibility of this particular response bias and reported that their data supported the feature-specific model. However, the present paper shows that analysis of their data by Santee and Egeth was incomplete and the comparisons inappropriate. In two experiments that used the Santee and Egeth paradigm, we failed to find support for the feature-specific model when more detailed analyses of the data were undertaken. In a third experiment, one that used the Bjork and Murray paradigm, but with control of response bias, no significant or suggestive evidence was found that feature similarity between noise and target letters affected recognition of the latter. 相似文献
214.
Nineteen children with developmental language impairments were given tests which measured syntactic and phonological skills in both comprehension and production conditions, semantic ability, syllable sequencing, and digit span. The results of discriminant function analysis show that the children could be divided into two groups. Group 1, expressive, was characterized primarily by deficits in the production of syntax and phonology. Group 2, expressive-receptive, was more impaired on measures of phonological discrimination, digit span, and semantic ability in addition to showing global syntactic deficits. An auditory-perceptual basis for the language impairments was not supported. 相似文献
215.
By way of survey-experimental methods, stigmatization responses of a college student sample and a community sample were examined to assess how sex of convicted felon and sex of subject affect levels of stigmatization. Major results were that (a) relatively high levels of stigmatization were expressed by subjects in both samples toward both male and female felons; (b) female felons, however, were the recipients of less stigmatization than male felons, with the difference being larger in the community than the student sample; and (c) sex of subject had little effect on the expression of stigmatization. It is suggested that the factors leading to less stigmatization of the female felon are nativeté concerning the female offender and greater fear of the male offender. Finally, attitudinal and background correlates of stigmatization are examined. 相似文献
216.
Lee Morris 《Pastoral Psychology》1968,19(6):33-41
Conclusion How may the evangelist project pastoral care in his preaching? This discussion sought to delineate some of the answers to this question. However, these cannot become answers for any herald of the Gospel unless he exercises an honest, sustained, self-critical probe into the inter-relatedness of his own being, attitudes toward congregants, and preaching. Erich Fromm asserts: There is no concept of man in which I myself am not included.29 Likewise, there is no discussion of preaching or of a preacher in which each minister should not include himself-self-evaluatively, perhaps confessionally. 相似文献
217.
The effects of preceding stimuli on the judgments of current stimuli were examined in a study using absolute judgments of loudness with feedback. It was found that the response on a given trial was dependent on the stimuli in the preceding sequence of at least five trials. Both assimilation and contrast effects were observed. The form of the dependency of a response on a prior stimulus was a function of the ordinal position of the stimulus in the preceding sequence of trials. The stimulus on the immediately preceding trial had an assimilative effect on the response and preceding stimuli two to five trials removed all showed a contrast effect on a given response. The extent to which these preceding stimuli contributed to the contrast effect was an increasing function of their recency. The reversal of the dependency of the response, from assimilation to the stimulus one trial back, to contrast with the stimuli two and more trials back, indicates a unique function of the immediately preceding stimulus in this task. Since there was a reduction in the variance of responses to those stimuli similar in value to the immediately preceding stimulus, it is proposed that the stimulus and feedback on the last trial were remembered and used asa standardin judging the presented stimulus. A model is presented in which it is assumed that the memory of the magnitude of the immediately preceding stimulus is contaminated in specified ways by prior stimuli in the series. The empirical findings of assimilation and contrastare expected consequences of the proposed memorial processes. 相似文献
218.
219.
A questionnaire survey revealed student needs, knowledge, and use of occupational information, as well as opinions about the most suitable location of such a resource on the Oregon State University campus. Results indicated that most students did not know where occupational information was available and only a small percentage knew there were occupational files in the Counseling Center and the University library. The great majority (almost 9 out of 10) wanted the University to provide a central occupational library, with most naming the Student Union (40 per cent) or the University library (25 per cent) as the best location. The Counseling Center was mentioned by only 2 per cent of the students. 相似文献
220.