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381.
Hilding B. Carlson 《Psychometrika》1945,10(4):283-301
This paper describes a simple orthogonal multiple factor approximation procedure that involves no inversion of the sign of negative residuals, the estimation of only as many communalities as there are factors, and none or only a few minor rotations of the axes in an attempt to obtain a meaningful solution. It also suggests a technique for the estimation of those communalities that must be estimated. The factor loadings obtained by means of this procedure, which we shall designate as the pre-selection procedure, are affected by the order in which the factors are obtained, showing a reduction in variance accounted for by each successive factor, as is characteristic of the centroid, bi-factor, and principal factor solutions. The entire procedure takes considerably less time than that involved in the orthodox centroid method alone. 相似文献
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Paul E. Carlson 《Reading Psychology》2013,34(3-4):251-265
Single subject designs, developed in clinical settings, are currently being used for diagnosis and instruction in schools. Three of these designs are useful in diagnosing student problems and in measuring the effectiveness of specific interventions. The designs can be used to graph individual or small group progress. Moreover, each is selected on the basis of the type of learning task that the teacher deems appropriate. If the rules of each design are followed, the teacher can obtain instructionally relevant information and keep precise records. These designs present substantial evidence that can be used in assessment, instruction, and evaluation of individual students, intervention strategies, and curricula. 相似文献
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Most Americans are sorted into social networks that are largely politically homogeneous. A large body of political science research has explored the behavioral implications of being embedded in a politically homogeneous or heterogeneous network, but substantially less attention has been given to explaining why some people find themselves in politically homogeneous or heterogeneous social networks. In this article, we explore the psychological and physiological underpinnings of political network homogeneity. We use social network data from an original survey of 129 undergraduates paired with lab experimental evidence that measures individuals' physiological reactivity to an anticipated political discussion. Using our original survey and a separate nationally representative survey, we find suggestive evidence that individuals who are more socially anxious are more likely to share partisanship with their social network ties. Moreover, we find that individuals who experienced a greater increase in heart rate when anticipating a political discussion were more likely to be in homogeneous discussion networks, but we do not find a relationship between electrodermal activity and network homogeneity. Aversion to psychological and physiological discomfort induced by political discussions could contribute to social polarization in the American public. 相似文献
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