An approach to the analysis of an aptitude-treatment-interaction (ATI) design in which the treatment groups are based on an underlying factorial structure is described and illustrated. The approach emphasizes description with point and interval estimation. The example design considered consisted of two nominal treatment variables and one interval…

The homogeneity of group regressions test and regions of significance test are two procedures which are frequently recommended for testing and aptitude-treatment or trait-treatment interaction (ATI) hypothesis. The former is used to determine if treatment group regressions are nonparallel while the latter is used to determine the range of aptitude…

THIS STUDY WAS DESIGNED TO TEST THE HYPOTHESIS THAT ASSOCIATIVELY RELATED NOUNS EMBEDDED IN CONNECTED DISCOURSE--AT LEAST IN THE CASE OF ITEMS THAT APPEAR IN THE SAME OR IN CONTIGUOUS SENTENCES--ARE STORED MORE EFFICIENTLY THAN ASSOCIATIVELY UNRELATED NOUNS. A 2X2 FACTORIAL DESIGN WAS EMPLOYED (WITH 20 SS IN EACH GROUP) IN WHICH SS WERE ASKED TO…

THIS PAPER DEALS WITH SOME PSYCHOLOGICAL ASPECTS OF RHETORICAL FORM AND STRUCTURE. THE SUGGESTION IS MADE THAT THE FIRST CONSIDERATION IS A DEFINITION OF THE ENTITY--THE EFFECTIVE STIMULUS--TO WHICH THE S (SUBJECT) RESPONDS. THIS MEANS A SPECIFICATION OF FUNCTIONAL CONTEXT, IN WHICH THE S VIEWS A GIVEN LANGUAGE PERFORMANCE. THE PSYCHOLOGICAL…

The multiple regression or general linear model (GLM) is a parameter estimation and hypothesis testing model which encompasses and approaches the more familiar fixed effects analysis of variance (ANOVA). The transition from ANOVA to GLM is accomplished, roughly, by coding treatment level or group membership to produce a set of predictor or…

Modern reading theories that are concerned with the reading process of either mature or immature readers show no clearcut concern with unit size. The various graphic units that are encountered by the reader include letters, graphemes, clusters (such as blends), syllables, phonograms, affixes and roots, words, phrases, sentences, paragraphs,…

Some aspects of simultaneous tests for means are reviewed. Specifically, the comparison of univariate or multivariate normal populations based on the values of the means or mean vectors when the variances or covariance matrices are equal is discussed. Tukey's and Dunnett's tests for multiple comparisons of means, Scheffe's method of examining…

Designed for use with Research for Better Schools' evaluation system, this guide focuses upon basic concepts and statistical procedures applicable to specific research hypotheses emerging from evaluation questions. The first of three sections presents a discussion of descriptive statistics in terms of frequency, central tendency, variability, and…

When examining a repeated measures design with independent groups for a significant group by trial interaction, classical analysis of variance or multivariate procedures can be used if the assumptions underlying the tests are met. Neither procedure may be justified for designs with small sample sizes and dichotomous dependent variables. An omnibus…

Criticized is a paper by Johnson, Wyer, and Gilbert, "Quality education and integration: an exploratory study", ("Phylon" XXVIII, 1967, pp. 221-229). This study stated that (1) there may be more racial conflict in integrated schools and therefore educational quality may be lower than in less integrated schools, and (2) social class orientation of…

The present study used a set of bimodal (auditory-visual) conflict designed specifically for the preschool child. The basic component was a match-to-sample sequence designed to reduce the often-found contaminating factors in studies with young children: failure to understand or remember instructions, inability to perform the indicator response, or…

This study explores the speculation that unidentified factors such as organizational complexity might account for disparate research findings regarding the relationship between the administrative component and organization size. Complexity and size of organization were found to be significantly related variables, although there is no evidence to…

To test the influence of principals, subject matter experts, and department chairmen upon teacher decisions, an experiment was conducted with secondary school social studies teachers, principals, and department chairmen as participants. While the results of the experiment were uniformly nonsignificant, respondents generally concurred that the…

The purpose of this paper is to demonstrate the use of the general linear model (GLM) in problems with repeated measures on a dependent variable. Such problems include pretest-posttest designs, multitrial designs, and groups by trials designs. For each of these designs, a GLM analysis is demonstrated wherein full models are formed and restrictions…