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Peer reviewed Peer reviewed
ERIC Number: EJ249415
Record Type: CIJE
Publication Date: 1981
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
Segmented Polynomial Models in Quasi-Experimental Research.
Wasik, John L.
Educational and Psychological Measurement, v41 n2 p369-77 Sum 1981
The use of segmented polynomial models is explained. Examples of design matrices of dummy variables are given for the least squares analyses of time series and discontinuity quasi-experimental research designs. Linear combinations of dummy variable vectors appear to provide tests of effects in the two quasi-experimental designs. (Author/BW)
Descriptors: Least Squares Statistics, Mathematical Models, Multiple Regression Analysis, Quasiexperimental Design
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Polynomial Regression Models; Time Series Analysis