Hi On Mon, 21 Jan 2002, Larry Daily wrote: > I have a question for the statistically savvy TIPSters - what are your > thoughts on primary trait analysis from a statistical standpoint? Off the > top of my head, the numbers derived from a PTA rubric may or may not be > interval and that would seem to be a problem with using means, t-tests, etc,
I am not familiar with PTA, but it is not correct (with some dissenters) to think that scales must be interval for means, t-tests, etc. to be used in statistical analysis. Order is all that is required. See various Gaito publications, such as: Gaito, J., 1960, Scale, classification and statistics. Psychological Review, 67, 277-278. Gaito, J., 1980, Measurement scales and statistics: Resurgence of an old misconception. Psychological Bulletin, 87, 564-567. Gaito, J., 1986, Some issues in the measurement-statistics controversy. Canadian Psychology, 27, 63-68. Best wishes Jim ============================================================================ James M. Clark (204) 786-9757 Department of Psychology (204) 774-4134 Fax University of Winnipeg 4L05D Winnipeg, Manitoba R3B 2E9 [EMAIL PROTECTED] CANADA http://www.uwinnipeg.ca/~clark ============================================================================ --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]
