On 12 Nov 2003 14:44:19 -0800, [EMAIL PROTECTED] (Andrew Walsh) wrote: > hi all, > > i would like to examine the factor structure of a 20 item 'true/false' > scale i'm currently using. the authors have indicated that this measure > has a single factor solution, however my intuition says otherwise. > could you direct me to a few literary sources that specifically > addresses factor analysis with a dichotomous variable?
Roderick McDonald mentions them in his books, on Factor analysis, and Test theory. Everyone agrees that a FA program operating on Pearson correlations (phi coefficients, in this instance) splits out artifactual factors, when the dichotomies have different rates. -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html "Taxes are the price we pay for civilization." . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
