ERIC Number: ED338690
Record Type: RIE
Publication Date: 1991-Jan
Reference Count: N/A
Applying Procrustean Rotation To Evaluate the Generalizability of Research Results.
Tucker, Mary; Taylor, Dianne
The use of Procrustean rotation as a procedure for assessing the invariance of study results is proposed. Researchers have long relied on significance testing as a measure of judging the worthiness of empirical findings. However, significance testing has come under fire because it does not provide information about the importance or replicability of results. A major misconception is confusing statistical significance testing with reproducibility. Assessing the invariance of study results is a useful alternative. An example is given of an invariance technique following a discriminant analysis. The analysis was calculated from a hypothetical data set with 64 cases and two predictor variables. The rotation technique can be used as a cross-validation procedure, splitting the data from a single sample and comparing the factor vectors from each half. A Procrustean rotation forces orthogonal (uncorrelated) functions of factors to a "best fit" position after setting the factor vectors to unit length to equalize the contribution of each factor vector to the determination of the amount of rotation necessary. The RELATE computer program of D. J. Veldman was used for the necessary calculations. Four tables present data from the analysis. A 20-item list of references is included. (SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A
Identifiers: Empirical Research; Invariance; Procrustes Rotation; Research Replication
Note: Paper presented at the Annual Meeting of the Southwest Educational Research Association (San Antonio, TX, January 24-26, 1991).