ERIC Number: EJ483496
Record Type: CIJE
Publication Date: 1993
Reference Count: 0
Why Covariance? A Rationale for Using Analysis of Covariance Procedures in Randomized Students. Research Methods.
Taylor, Matthew J.; Innocenti, Mark S.
Journal of Early Intervention, v17 n4 p455-66 Fall 1993
This paper recommends use of analysis of covariance in early intervention research to account for pretreatment group differences and increase statistical power. Diagrams show how analysis of covariance manipulates data under various conditions. Simulated data analysis demonstrates the process of selecting covariates and shows the results with and without statistically adjusting for the effects of the covariate. (Author/JDD)
Publication Type: Journal Articles; Guides - Non-Classroom; Opinion Papers
Education Level: N/A
Authoring Institution: N/A