Theory; *Multidimensional Scaling

While factor analysis is the lost ' comaoilly proposed procedure for determining dimensionality, a recently defeloped procedure called order analysis may also prove to be useful for isolating unidimensional item sets. The first study in this report compares three order analyiis procedures: Krus and Bart's (1974) procedure and Reynolds ' (1976) procedures using,two of Cliff's (1977) consistency indices. The compariscins were based on seven simulated data sets with known factorial diaensionality, and two multidimensional sets of mathematics data.:The second ' Aeyno4.ds procedure reproduced the factor structure for the simulated data zeta, but none of the procedures-could reproduce the factors for the mathematics data. The secon. study in this report presents preliminary results using a new order- analysis'procedure which solves some of the difficulties with reproducing factorial diaensionality. (Author/BW) Reproductions supplied by EDRS are the best that can be made from the original document