This investigation compares overt judgments about tenable hypotheses to choices in a concept identification task, as a function of stimulus similarity on successive trials. Two mathematical models are tested: (a) A 1-element local consistency version of Restle's concept identification model and (b) the same model with two additional passive states…

For this study, a 5th and 6th grade team taught classroom of 66 children was chosen. Three equivalent groups of 22 children each were matched on the basis of a pretest in math. Each group was given a different noise level treatment: quiet (45-55 decibels), average (55-70 decibels), and noisy (75-90 decibels). A tape recording of actual classroom…

The hypothesis discussed in this article is that positive attention to the creative process with ample opportunity to write and tell stories and ideas will result in more competency in the skills of writing - and considerable more success and joy in the art of writing - than will the teaching of the skills per se in the early years. To nurture…

Marascuilo and Levin's (1970) notion of Type IV errors is extended, with respect to the interpretation of interactions in analysis of variance (ANOVA) designs. To help clarity what an interaction is and what it is not, in terms of the ANOVA model, the following points are made: (i) interactions should be thought of as linear contrasts involving…

To gather data on the effects of different modes of instruction on physician achievement in plotting mean P, O, RS, and T receptiors in electrocardiography, researchers chose a random sample of physicians who had taken a correspondence course on electrocardiography during the previous 5 years from the University of Southern California School of…

We concern ourselves with the hypothesis that two variables have a perfect disattenuated correlation, hence measure the same trait except for errors of measurement. This hypothesis is equivalent to saying, within the adopted model, that true scores of two psychological tests satisfy a linear relation. Statistical tests of this hypothesis are…

A series of studies on observer biases revealed that simply informing observers of experimental hypotheses does not produce observational data consonant with those hypotheses. However, questionnaire responses following an experiment with different induced expectations does produce global data consonant with experimental hypotheses. In addition, if…

The three papers presented in this publication examines in depth the thought and practices that currently prevail in the specialized areas of reading and concept attainment. Two of the papers deal with concept learning and the transformation of this knowledge into instructional guidelines. The third paper considers the importance of concept…

A study was conducted to investigate the impact which certain cognitive styles or structures have in mediating the influence of aggressive television on young boys. The subjects were 143 boys, ranging in age from 5-1/2 to 8-1/2 years, attending elementary school in the Santa Monica area. During the first of two sessions, each child was…

Several sets of evidence are offered to support the hypothesis that cognitive and social development are intimately interrelated, and that mother-infant interaction influences both. A mother's prompt responsiveness to her baby's signals tends to foster the development of varied and clear modes of communication and thus the development of one facet…

Summary descriptions of the samples of teachers who participated in different project activities are given. In addition, descriptions of reporters of incidents in each student behavior category are outlined. (See TM 001 375 for project description.) (MS)

The power of the classical Linear Discriminant Function (LDF) is compared, using Monte Carlo techniques with five other procedures for classifying observations from certain non-normal distributions. The alternative procedures considered are the Quadratic Discriminant Function, a Nearest Neighbor Procedure with Probability Blocks, and three density…

In order to test the hypothesis that size of place of residence and urban proximity preferences constitute factors in population dispersal migration behavior, a random sample of 777 Pennsylvania households plus a sample screened for moving probability (N=319) were surveyed via personal interviews in 1974. A follow-up survey on actual migration…

Examines the impact that social position has on the attainment values which parents hold for their children. Research is based on the question of the relationship between parents' social status or social class and parents' aspirations and expectations for their children. ( Author/RK)

Textbook calculations of statistical power or sample size follow from formulas that assume that the variables under consideration are measured without error. However, in the real world of behavioral research, errors of measurement cannot be neglected. The determination of sample size is discussed, and an example illustrates blocking strategy.…