ISSN:
1432-1343
Keywords:
Individual differences
;
Multidimensional scaling
;
Rational starting configuration
;
INDSCAL
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mathematics
Notes:
Abstract Five different methods for obtaining a rational initial estimate of the stimulus space in the INDSCAL model were compared using the SINDSCAL program for fitting INDSCAL. The effect of the number of stimuli, the number of subjects, the dimensionality, and the amount of error on the quality and efficiency of the final SINDSCAL solution were investigated in a Monte Carlo study. We found that the quality of the final solution was not affected by the choice of the initialization method, suggesting that SINDSCAL finds a global optimum regardless of the initialization method used. The most efficient procedures were the methods proposed by by de Leeuw and Pruzansky (1978) and by Flury and Gautschi (1986) for the simultaneous diagonalization of several positive definite symmetric matrices, and a method based on linearly constraining the stimulus space using the CANDELINC approach developed by Carroll, Pruzansky, and Kruskal (1980).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01908591
