An influential statistics test recommends a Levene text for homogeneity of variance. A recent note suggests that Levene's test is upwardly biased for small samples. Another report shows inflated Alpha estimates and low power. Neither study utilized more than two sample sizes. This Monte Carlo study involved sampling from a normal population for…

Comprehension of a problem or task that is generated in the real world rather than presented as a well-defined problem-statement of the kind encountered in textbooks or psychological laboratories was related to the ability of recognizing, selecting and formulating problems. The process of acquiring and utilizing this ability was conceptualized…

Compensatory education for disadvantaged preschool children includes, as one of its central components, a planned intervention program which is to provide the deprived child with linguistic skills comparable to those acquired naturally by children with a middle-class background. The hypothesis guiding the design and implementation of this study…

To study the effects of task and sample variation upon paired-associates (PA) performance, six third-grade and six sixth-grade classes in two urban schools were tested on two PA tasks, one pairing pictures of familiar objects (PA-CF), the other pairing nonsense syllables with Japanese "kanji" (PA-K). Hypotheses tested were: (1) Mean level of…

The logical structure of the Campbell and Fiske multitrait-multimethod approach is applied to the problem of studying growth and its determinants. The resulting model is a special case of Joreskog's general model for the analysis of covariance structures. The relationships of traditional psychometric formulations to this model are detailed.…

A new variant of the standard method for estimating the accuracy of educational tests is examined. It is found that the estimates produced by the new method are essentially unbiased and that the typical sizes of the errors of the estimates approach their theoretical lower limit as size increases, though they are still noticably above it for small…

This study proposes to explore characteristics not usually considered musical, and yet which might combine in persons in such a way that results may lead to a clearer understanding and more accurate measurement and prediction of musical talent. Two hypotheses were tested: (1) Musical talent can be predicted by means of a selected set of variables…

This bibliography of research on counterattitudinal advocacy begins with a list of independent variables, cross-indexed with authors. In the research summaries, the compiler has followed a consistent pattern of organization: (1) the hypotheses are stated first, followed by the independent and dependent variables, (2) a summary of the manipulation…

Intraclass correlation reliability estimates are based on the assumption that the various measures are equivalent. Joreskog's (1970) general model for the analysis of covariance structures can be used to test the validity of this assumption. (For related document, see TM 002 301.) (Author)

A general Computer program is described that will compute asymptotic standard errors and carry out significance tests for an endless variety of (standard and) nonstandard large-sample statistical problems, without requiring the statistician to derive asymptotic standard error formulas. The program assumes that the observations have a multinormal…

Data are presented to show that reinforcement and exact repetition of adult speech are beneficial but not necessary components of a modeling procedure which results in production of novel linguistic forms by children. Laboratory studies suggest the need for a re-evaluation of current hypotheses about the limited role of imitation in language…

The Monte Carlo method was used, and the factors considered were (1) level of main effects in the population; (2) level of interaction effects in the population; (3) alpha level used in determining whether to pool; and (4) number of degrees of freedom. The results indicated that when the ratio degrees of freedom (axb)/degrees of freedom (within)…

Campbell (l969) argued for the interrupted time-series experiment as a useful methodology for testing intervention effects in the social sciences. The validity of the statistical hypothesis testing of time-series, is, however, dependent upon the proper identification of the underlying stochastic nature of the data. Several types of model…

It was reasoned that younger children would be more susceptible to situational uncertainty, and thereby imitate more than older children or peers tested under more structured conditions. Children 6 through 8 and 12 through 14 years old were tested for target-relevant and incidental imitation under conditions of high and low structure. (Editor/RK)

This is part three of a three-part series concerned with the empirical development of homogeneous families of insurance company jobs based on data from the Position Analysis Questionnaire (PAQ). This part involves validity generalizations within the job families which resulted from the previous research. (Editor/RK)