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Delaney, Harold D.; Maxwell, Scott E. – 1983
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…
Descriptors: Analysis of Covariance, Aptitude Treatment Interaction, Data Analysis, Individual Differences

Carroll, John B. – Intelligence, 1978
Recent studies are examined for methodological adequacy in establishing dimensions of individual differences in information-processing abilities, and the theoretical problems involved in inferring psychological processes from individual difference dimensions. Methodological inadequacies include use of small samples, questionable procedures in…
Descriptors: Cognitive Ability, Cognitive Processes, Individual Differences, Intelligence Differences

Rogosa, David; And Others – Journal of Educational Psychology, 1984
Using observational data on classroom teachers, statistical procedures are presented for studying two questions on the stability of teacher behavior over time: (1) Is the individual teacher's behavior consistent? and (2) Are individual differences among teachers consistent? Approaches and methods of previous temporal stability studies are…
Descriptors: Classroom Observation Techniques, Elementary Secondary Education, Individual Differences, Mathematical Models

Finley, Gordon E. – Adoption Quarterly, 1998
Presents two chain-of-choices models, one for adoptive parents and one for birth parents and adoptees, as possible frameworks within which to consider the role of individual differences, choices, and selections in understanding the process of adoption and adoption outcomes. Discusses the research and practice implications following from the…
Descriptors: Adopted Children, Adoption, Adoptive Parents, Biological Parents
Miller, Trudi C. – 1980
A review of literature relevant to equal educational opportunity is presented in order to support an argument for the use of normative models in educational research. The literature review shows that confusion over the 1966 Coleman Report was due to a mismatch between the implied reform objective of the report and its statistical approach. The…
Descriptors: Academic Achievement, Blacks, Comparative Analysis, Desegregation Effects
Horowitz, Frances Degen – 1986
An aim of many students of human development is to penetrate behavioral variability in such a way as to reveal stable phenomena. This broad aim is challenged on numerous fronts when researchers study infant behavior, for students of infants are everywhere confronted with variability. But, in the context of research, variability of subjects'…
Descriptors: Individual Characteristics, Individual Development, Individual Differences, Infant Behavior
Proger, Barton B.; And Others – 1976
The problem of variability of data, even in presumable homogeneous subgroupings of handicapped children, which contaminates the results of many special education curriculum evaluation studies is examined with a study of 103 second-grade learning disabled students. The distortion of statistics calculated on samples of extreme variability; coupled…
Descriptors: Behavioral Objectives, Case Studies, Curriculum Evaluation, Exceptional Child Research
Marx, Thomas – 1973
When two groups, initially dissimilar, undergo different treatments, can subsequent differences be partitioned in such a way that the difference between the two treatments is unbiased? This is the central problem of this paper, and it is confronted by the examination of two levels of information using a Follow Through Evaluation. The first…
Descriptors: Achievement Tests, Analysis of Covariance, Analysis of Variance, Comparative Analysis