The generalizability theory approach to the estimation of reliability is outlined, and a design is developed in which systematic variations in behavior over differing situations are separated from random fluctuation. Three coefficients of reliability are proposed. (CK)

With an example of OScAR 5V records from four seventh-grade classrooms, this article illustrates the fact that conclusions in any study depend on decision-making processes. Careful examination of the decision-making process is suggested since resulting judgments and implications are rarely scrutinized. (CK)

The effects of competitive treatments on performance, interest, and retention were examined with the use of a ten-day vocabulary task administered in sixty-six fifth grade classrooms. Neither performance nor retention was increased under the competitive treatments. (CK)

Observer's ratings of teachers of interracial sixth grade classrooms are related to their pupils' academic growth, self-concept, and interracial friendship behavior. (Author/AG)

The study examined the effects of three self-instructional approaches of teaching diagnostic problem-solving. Two of the approaches attempted to stimulate student-equipment interaction via programmed and text instruction while a third approach utilized actual equipment. The equipment approach was superior to non-equipment simulation approaches.…

A longitudinal study of the academic growth of Negro and white students who attended the same high schools and were enrolled in the same curricula. (Author/CK)

The self-concept of the children studied was significantly affected by their ethnic group membership but not by the majority-minority mixture of the groups within the schools. (Author/CK)

Criticizes some methods used to derive educational models and offers suggestions for improvement. (Author/CK)

Results previously appearing to be non-replicable turned out to be replicated when analyzed separately for male and female instructors. (Author/DG)