Successive unfolding is a recently developed technique
that appears to have advantages over traditional
unfolding techniques. To assess its usefulness, successive,
internal, and a type of external unfolding were
compared with regard to the stimulus configurations
recovered, the fit of the models as a whole, the fit of
individual subjects, and each model’s stability in a
cross-validation sample. The data were obtained from
judgments of similarity of and preference for occupational
titles. Internal unfolding yielded degenerate solutions
and was dropped from subsequent analyses.
External and successive unfolding yielded interpretable
dimensions, but the nature of the dimensions uncovered
differed somewhat from one type of unfolding to
the other. Both types of unfolding fit the data adequately
for the stimulus configuration, though successive
unfolding appeared to fit better. The first two dimensions
of both models were well reproduced in
cross-validation samples. Dimensions beyond the second
were more easily cross-validated using external
unfolding. Successive unfolding proved superior to external
unfolding in representing preference data as indicated
by the fit of ideal points. Successive unfolding
appears a viable method in unfolding research.
Brannick, Michael T & Hahn, June. (1985). A comparison of internal, external, and successive unfolding based on occupational judgments. Applied Psychological Measurement, 9, 199-208. doi:10.1177/014662168500900208
Brannick, Michael T.; Hahn, June.
A comparison of internal, external, and successive unfolding based on occupational judgments.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.