Teacher immediacy has surfaced as an important instructional communication variable, yet little is known about how it functions to effect learning. To offer an explanation as to how teacher immediacy facilitates learning, a study investigated implicit communication theory. Subjects consisted of 625 undergraduate students who completed…

Teacher immediacy and use of power have surfaced as important instructional communication variables, yet little is known about how they function to effect learning. To offer an explanation as to how teacher immediacy and use of power facilitates learning, a study investigated implicit communication theory. Subjects consisted of 625 undergraduate…

The data analysis problem posed by a repeated measures design that includes a single observation on a covariate for each subject is considered. The current paper discusses how best to capture a possible dependence of the effect of the within-subject factor on the level of the covariate. Procedures originally explicated by Rogosa (1980) for dealing…

Problems associated with the use of analysis of covariance (ANCOVA) as a statistical control technique are explained. Three problems relate to the use of "OVA" methods (analysis of variance, analysis of covariance, multivariate analysis of variance, and multivariate analysis of covariance) in general. These are: (1) the wasting of information when…

Prior research has shown that the media play an agenda-setting role in political campaigns. A theoretical model was developed to investigate intrapersonal agenda's relationship with certain contingent factors. To test the model a study of the intrapersonal agenda (personally perceived salience of public issues) was then conducted as part of the…

A study examined the role of the mass media in the symbolization process (a process which was necessary to distract attention from the political and economic problems of the European Community and to enhance support of the powerless parliament) during the European election campaign of 1984 and whether symbolization strengthened the motivation for…

A Monte Carlo study was done to determine the adequate sample size for quasi-experimental regression studies, which compare regression lines for two groups and estimate their point of intersection. Populations of 1,000 subjects in each of two groups were constructed (using random normal deviates) to yield equivalent regression lines of opposite…

Numerous designs using analysis of variance (ANOVA) to test ordinal hypotheses were assessed using a Monte Carlo simulation. Each statistic was computed on each of over 10,000 random samples drawn from a variety of population conditions. The number of groups, population variance, and patterns of population means were varied. In the non-null…

An empirical method called Predicted Error Sum of Squares (PRESS) is advanced and studied. This method is used to examine the cross-validated prediction accuracies of some popular algorithms for weighted predictor variables. The weighting methods that were considered were ordinary least squares, ridge regression, regression on principal…

The Portland (Oregon) Public Schools undertook studies of regression based on a three-year data base of fall and spring test results in grades 3 through 8 in reading, language usage and mathematics. The objective of these regression studies was to determine the amount of correction for regression to the mean needed to accurately represent the…

A study examined the assumption that writing is a way to learn by examining the relative effects of writing and studying as learning aids. The study also explored the role of individual differences in an effort to identify features of the writing process that may influence what students learn through writing. The experiment used think-aloud…

Three aspects to be considered when teaching a one-semester beginning economics statistics course are coverage, mastery, and applications. There is a difference between coverage and mastery. Moreover, mastery is not an end in itself; instructors must consider how statistics courses will influence students' approaches to other subjects and…

This study examined the relationship between student achievement on the Texas Assessment of Basic Skills (TABS) test and the total student population in 206 school districts in North Texas. Regression analyses results indicated that average student performance on the TABS was positively affected by local expenditures, negatively affected as the…

Forty adolescent subjects with behavior problems at home or at school were administered the Woodcock Reading Mastery Tests. Subjects ranged in age from 12 to 18, and included 25 males and 15 females. The Passage Comprehension Test for each subject was rescored using three different ceiling criteria: (1) five errors in six consecutive responses,…

Problems associated with the analysis of data collected using the Solomon Four Group Design are discussed. The design includes an experimental group and a control group that have been pretested and posttested, and an experimental and a control group that have been posttested only. A sample problem is approached in three different ways. First, the…