From the best-fit lines corresponding to sets of families of conditional judgements, the constant stimulus family and the constant condition family, both defined for a same scale object, the coordinate values of the point of intersection of both lines (indifference point) are obtained. These values are studied in relation to the mean values of the…

Ridge regression is an approach to ameliorating the problem of large standard errors of regression estimates when predictor variables are highly intercorrelated. An interactive computer program is presented which allows for investigation of the effects of using various ridge regression adjustment values. (JKS)

It is known that for trivariate distributions, if two correlations are fixed, the remaining correlation is constrained. If just one is fixed, the remaining two are constrained. Both results are extended to the case of a multivariate distribution. (Author/JKS)

Velicer (1978) defines suppression situations in terms of the relations between part correlation and zero order validity. Conger (1974) defines suppressor in terms of regression weights. The present work clarifies the difference between the two approaches: Velicer's suppressor circumscribes only a subset of the suppression situations as defined by…

To facilitate statistical decisions about sets of results encompassing more than a single isolated test, a joint probability multiple comparisons significance test for path analysis, multiple regression, and a correlation matrix is developed. (Author/AEF)

Real data are used to illustrate the comparison of two estimators for the square of a population correlation coefficient and the true validity of a sample prediction equation. Interpretive approaches to, and problems in, multiple correlation/prediction estimation are discussed. (Author/BW)

A method is discussed which extends canonical regression analysis to the situation where the variables may be measured as nominal, ordinal, or interval, and where they may be either continuous or discrete. The method, which is purely descriptive, uses an alternating least squares algorithm and is robust. Examples are provided. (Author/JKS)

Cross-validation procedures are proposed as a supplement to significance testing for external analysis of models relating stimulus preferences to known multidimensional scale values (Preference models). Examples of the usefulness of the validation procedures are provided. (Author/JKS)

The multitude of procedures for testing hypotheses about mean contrasts often presented in statistical methods textbooks is unwarranted. This article demonstrates that nearly all such research can be handled by a single contrast test statistic often attributed to R. A. Fisher. (TJH)

Issues in the detection and interpretation of interaction effects between quantitative variables in multiple regression analysis are discussed. Recent discussions associated with problems of multicollinearity are reviewed in the context of the conditional nature of multiple regression with product terms. (TJH)

Cognitive care training, also known as dementia training, has changed significantly, and negatively, since 1993 in New York State nursing homes. The research reported in this paper examines the employment requirements for cognitive care training and the actual post-employment cognitive care training. The research involved a replication of the…

This study invokes the ecological approach to social support by examining how school social support relates to moderate or severe adolescent depression. School is seen as not only a place for supportive individual-level relationships, but also as a source of community support created by teachers and other students. The main purpose of the study is…

The purpose of this study was to identify intrinsic and extrinsic variables that influence teacher job satisfaction and retention. A survey was sent to 300 randomly selected Missouri public elementary school teachers in grades K-5 having 5 or more years of teaching experience. The results from 201 respondents suggest that three intrinsic…

Introduction: Recent research in educational psychology has explored student approaches to learning (SAL) and epistemological beliefs within the theoretical framework of self-regulated learning. The focus of this research study seeks to explore the predictiveness of learning approaches and epistemological beliefs on students' self-regulatory…

Context: Health-related quality of life (HRQOL) is a multi-dimensional construct including aspects of life quality or function that are affected by physical health and symptoms, psychosocial factors, and psychiatric conditions. HRQOL gives a broader measure of the burden of disease than physical impairment or disability levels. Purpose: To…