detect varlist , partition(numlist) [noscores norestscores]
varlist is a list of two existing dichotomous variables (items) or more. The first items of this list compose the first dimension, the following items define the second dimension, as so on.
partition permit to define the number of items in each dimension. The user must precise in the numlist the number of items in each dimension.
noscores permit to remove the table of the correlations between the items and the scores
norestscores permit to remove the table of the correlations between the items and the rest-scores
detect permit to compute the DETECT index (Dimensionality Evaluation to Enumerate Contributing Traits), as the Iss (Approximate Simple Structure Index) and the R indexes defined by Zhang and Stout (1999).
For detailed information on the DETECT, Iss and R indexes, see Zhang and Stout (1999).
detect don't permit the use of polytomous items.
. detect item1 item2 item3 item4 , partition(2 2) nosco norest
. detect item1 item2 item3 item4 item 5 item6 item7 , partition(3 2 2)
Zhang J. and Stout W., The theorical DETECT index of dimensionality and its application to approximate simple structure, Psychometrika, vol.64(2), 1999, pp. 213-249.
Jean-Benoit Hardouin, Regional Health Observatory (ORS) - 1, rue Porte Madeleine - BP 2439 - 45032 Orleans Cedex 1 - France. You can contact the author at email@example.com and visit the