The search for necessary and sufficient causes of some outcome of interest, referred to as "configurational comparative research," has long been one of the main preoccupations of evaluation scholars and practitioners. However, only the last three decades have witnessed the evolution of a set of formal methods that are sufficiently…

Web-based tutorials offer an opportunity to provide automated individualized feedback to help students develop, for example, the ability to identify independent and dependent variables and the ability to discriminate between experimental and predictor variables. Doing so enables them to distinguish between the relatively clear-cut causal…

With an emphasis on procedural fundamentals, the original behavior-analytic equivalence experiments and the equivalence paradigm are described briefly. A few of the subsequent developments and implications are noted, with special reference to the possible significance of the findings with respect to language and cognition. (Contains 9 figures.)

This paper discusses how a seldom-used statistical procedure, recursive regression (RR), can numerically and graphically illustrate data-driven nonlinear relationships and interaction of variables. This routine falls into the family of exploratory techniques, yet a few interesting features make it a valuable compliment to factor analysis and…

The Greater Pittsburgh Literacy Council tested four systems that could be used to provide supportive services to a minimum of 100 volunteer literacy tutors. The following four support systems were developed: a program providing for telephone consultation by a reading specialist, informal meetings of volunteer tutors, workshop class reunions, and a…