Detecting Changes of Level and Slope in Repeated-Measures Data
- 1 February 1984
- journal article
- research article
- Published by SAGE Publications in Sociological Methods & Research
- Vol. 12 (3), 263-277
- https://doi.org/10.1177/0049124184012003002
Abstract
This article examines the following situation: A variable is measured for a sample of subjects on several occasions before and after an experimental intervention thought to affect the variable. This situation had broad application in the social sciences and elsewhere. The article introduces MANOVA tests for changes in level and slope that arise as a consequence of the intervention. These methods are illustrated using data from a social-psychological study. The approach may be extended to studies in which there are several groups of subjects.Keywords
This publication has 3 references indexed in Scilit:
- Comment on Simonton's "Cross-sectional time-series experiments: Some suggested statistical analyses."Psychological Bulletin, 1978
- Cross-sectional time-series experiments: Some suggested statistical analyses.Psychological Bulletin, 1977
- Intervention Analysis with Applications to Economic and Environmental ProblemsJournal of the American Statistical Association, 1975