Multiple Local Solutions and Geomin Rotation |
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Authors: | Minami Hattori Kristopher J. Preacher |
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Affiliation: | 1. University of Notre Dame;2. Vanderbilt University |
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Abstract: | In exploratory factor analysis, factor rotation is conducted to improve model interpretability. A promising and increasingly popular factor rotation method is geomin rotation. Geomin rotation, however, frequently encounters multiple local solutions. We report a simulation study that explores the frequency of local solutions in geomin rotation and the implications of such phenomena. The findings include: (1) multiple local solutions exist for geomin rotation in a variety of situations; (2) ? = .01 provides satisfactory rotated factor loadings in most situations; (3) 100 random starts appear sufficient to examine the multiple solution phenomenon; and (4) a population global solution may correspond to a sample local solution rather than the sample global solution. |
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Keywords: | Factor analysis factor rotation geomin local solutions |
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