Researchers sometimes use stepwise methods to eliminate variables from analyses when the variables do not appreciably improve the ability to explain or predict inferences about the importance of various predictor variables. It is argued that stepwise methods are usually not appropriate for these purposes for three reasons. First, some researchers…

It is the purpose of this paper to investigate the chance nature of overfit as it relates to a regression formulation of research, to describe a model for projecting the overfit, and to empirically validate the model. (Author)

The identification of variables useful in the prediction of drug abuse has been the subject of a great deal of research. The research presented in this report attempts to add to the existing collection of information concerning variables useful in the prediction of drug abuse. An experimental instrument, the Social Factors Questionnaire, was…

Some of the methodological considerations in school effectiveness studies are outlined and a state of the art presented. Two general theoretical models are given which provide the researcher with an overall strategy for handling such a study of school effectiveness: the Dyer Model and Production Process Model. Six statistical models which provide…

Three dimensional contingency tables in which one variable is considered to be a factor and the other two variables have a natural relationship (such as left and right eye vision) are analyzed. Models involving symmetry and proportional symmetry between the related variables are also presented. (Author/JKS)

Through a study of American and Canadian managers, tested the utility of Lawler's model of the determinants of pay satisfaction and the value of adding to Lawler's model a category of variables for perceptions of pay-system administration. The study findings are then used to develop a modified model. For availability see EA 507 670. (Author/JG)

The notion that all students should finish high school has grown throughout the last century and continues to be an important goal for all educational levels in this new century. Non-completion has been related to all sorts of social, financial, and psychological issues. Many studies have attempted to put together a process that will identify…

This study examined the robustness of the "U.S. News and World Report" graduation rate performance indicator used in the magazine's college rankings. The graduation rate performance indicator is calculated as the difference between an institution's actual graduation rate and its predicted graduation rate, and is based on a linear…

(See also TM 501 087, TM 501 088, TM 501 090.)

(See also TM 501 087, TM 501 088, and TM 501 089.)

Results in this study suggest that it is possible to use performance on a moderator or predictability scale to select a subgroup for whom correspondence between two predictors and the criterion is much greater than that of a subgroup whose scores on the moderator indicate a lesser degree of correspondence. (Author/ES)

This paper discusses how full model dummy variables can be used with partial correlation or multiple regression procedures to compute matrices of pooled within-group correlations. (Author/CTM)

Equations for estimating the value of the multiple correlation coefficient in the population underlying a sample and the value of the population validity coefficient of a sample regression equation were investigated. Results indicated that cross-validation may no longer be necessary for certain purposes. (Author/MH)

This quantitative research study used ex post facto data to analyze possible relationships between a discrete set of independent variables and academic achievement among provisionally admitted students at a public, four-year historically black university located in the mid-Atlantic United States. The independent variables were first-generation…

The primary purpose of this study was to assess the impact of the GROW program on the intrinsic, extrinsic, and the general job satisfaction of principals and assistant principals in Pennsylvania. The impact of the variables of year in position, age, gender, level of work, location of school, and present degree was examined; the impact of…