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141.
Ledyard R. Tucker 《Psychometrika》1944,9(1):43-68
A factorial rotational method is presented which represents a compromise between the use of subjective judgment characteristic of graphical methods and the routine application of analytical methods. At present the analytical methods seem to be inadequate for the discovery of a simple structure, while graphical methods require more subjective judgment. The method herein presented locates the axes for subgroups of tests by an analytical method. The judgments used in the selection of subgroups are based on graphic data concerning interrelation of the factors. 相似文献
142.
Some mathematical notes on three-mode factor analysis 总被引:10,自引:0,他引:10
Ledyard R Tucker 《Psychometrika》1966,31(3):279-311
The model for three-mode factor analysis is discussed in terms of newer applications of mathematical processes including a type of matrix process termed the Kronecker product and the definition of combination variables. Three methods of analysis to a type of extension of principal components analysis are discussed. Methods II and III are applicable to analysis of data collected for a large sample of individuals. An extension of the model is described in which allowance is made for unique variance for each combination variable when the data are collected for a large sample of individuals. 相似文献
143.
Ashley A. Schiffer Brooke E. Wilcox Tucker L. Jones Donald A. Saucier 《Social and Personality Psychology Compass》2023,17(10):e12822
Varying opinions about the COVID-19 pandemic inspire different behaviors (e.g., mask-wearing), and confrontation may result between people with differing viewpoints. Individual differences associated with belief superiority (e.g., Social Vigilantism; SV) and/or pride (e.g., Masculine Honor Beliefs; MHB) likely related to third-person perceptions of pandemic confrontations. In this study (N = 237; US sample), we used vignettes in a 2 (Mask: Yes/No) × 2(Confrontation Response: Vocal Defense/Walked Away) between-groups design to examine how SV and MHB predict perceptions of (1) responses to public confrontation about (not) wearing a mask and (2) the person being confronted. In general, mask-wearing and walking away from confrontation were perceived more positively. Higher SV was associated with more positive perceptions of seemingly morally-justified responses to confrontation (e.g., walking away when confronted for not wearing a mask, vocally defending oneself when confronted for wearing a mask). Contrarily, higher MHB were associated with more positive perceptions of non-mask-wearing. This research provides insight about how individual differences in SV and MHB relate to nuances in pandemic confrontations, and responses to confrontations, about (non)mask-wearing. 相似文献
144.
Aviezer Tucker 《Erkenntnis》1998,48(1):61-83
The paper explicates unique events and investigates their epistemology. Explications of unique events as individuated, different, and emergent are philosophically uninteresting. Unique events are topics of why-questions that radically underdetermine all their potential explanations. Uniqueness that is relative to a level of scientific development is differentiated from absolute uniqueness. Science eliminates relative uniqueness by discovery of recurrence of events and properties, falsification of assumptions of why-questions, and methodological simplification e.g. by explanatory methodological reduction. Finally, an overview of contemporary philosophical disputes that hinge on issues of uniqueness emphasizes its philosophical significance. 相似文献
145.
The discrete sampling of the brain’s electrical field at the scalp surface with individual recording sensors is subject to the same sampling error as the discrete sampling of the time series at any one sensor with analog-to-digital conversion. Unlike temporal sampling, spatial sampling is intrinsically discrete, so that the post hoc application of analog anti-aliasing filters is not possible. However, the skull acts as a low-pass spatial filter of the brain’s electrical field, attenuating the high spatial frequency information. Because of the skull’s spatial filtering, a discrete sampling of the spatial field with a reasonable number of scalp electrodes is possible. In this paper, we provide theoretical and experimental evidence that adequately sampling the human electroencephalograph (EEG) across the full surface of the head requires a minimum of 128 sensors. Further studies with each of the major EEG and event-related potential phenomena are required in order to determine the spatial frequency of these phenomena and in order to determine whether additional increases in sensor density beyond 128 channels will improve the spatial resolution of the scalp EEG. 相似文献
146.
147.
Maximum validity of a test with equivalent items 总被引:1,自引:0,他引:1
Ledyard R Tucker 《Psychometrika》1946,11(1):1-13
It is assumed that a scale of true scores on a function exists and that the probability of answering an item correctly is a curve of the type of the integral of the normal curve. The product moment correlation between the test score and true score is derived for a normal distribution of subjects and a test composed of equivalent items. Numerical examples demonstrate that the maximum correlation between test scores and true scores occurs for a one hundred item test when the point correlation between items is less than three tenths. 相似文献
148.
From a theoretical point of view, paired comparisons and the law of comparative judgment provide an excellent approach to the problem of psychological measurement. However, if a reasonably large number of stimuli are to be investigated, paired comparisons become extremely time-consuming and fatiguing to the subjects. A balanced incomplete block design, requiring multiple rank order judgments for each subject, provides an efficient experimental method for obtaining paired comparisons judgments. Features of the analysis proposed for this design are discussed in detail. A program for the analysis is available for the IBM 650 electronic computer.Prepared in connection with research done under Office of Naval Research Contract Nonr 1858-(15), Project Designation NR 150-088, and National Science Foundation Grant G-3407. Reproduction of any part of this material is permitted for any purpose of the United States Government. 相似文献
149.
An inter-battery method of factor analysis 总被引:4,自引:0,他引:4
Ledyard R Tucker 《Psychometrika》1958,23(2):111-136
The inter-battery method of factor analysis was devised to provide information relevant to the stability of factors over different selections of tests. Two batteries of tests, postulated to depend on the same common factors, but not parallel tests, are given to one sample of individuals. Factors are determined from the correlation of the tests in one battery with the tests in the other battery. These factors are only those that are common to the two batteries. No communality estimates are required. A statistical test is provided for judging the minimum number of factors involved. Rotation of axes is carried out independently for the two batteries. A final step provides the correlation between factors determined by scores on the tests in the two batteries. The correlations between corresponding factors are taken as factor reliability coefficients.This research was jointly supported by Princeton University and the Office of Naval Research under contract N6onr-270-20 and the National Science Foundation under grant NSF G-642; Harold Gulliksen, principal investigator. The preparation of this paper and the accompanying material has been aided by the Educational Testing Service. The author is grateful to Professors Harold Gulliksen and Samuel S. Wilks for their many most helpful comments and suggestions. 相似文献
150.
Christopher W. Dunn Carolyn M. Tucker 《Journal of multicultural counseling and development》1993,21(2):79-87
The authors investigated differences in low-income Black children's adaptive functioning and maladaptive behavior in association with their father-figures' presence or absence, grade level, gender, and quality of family support as perceived by the children's caregivers. 相似文献