Hi On Thu, 18 Oct 2001, Wouter Duyck wrote: > Suppose i have a factorial design with two between-subject factors (one > factor A of 3 levels and one factor B of 2 levels) en two within-subject > factors (one factor C of 2 levels and one factor D of 5 levels). Of course, > to perform an ANOVA on this data, my matrix should like : > > Subj. A B C1D1 C1D2 ... C1D5 ... C2D1 ... > C2D5 > 1 1 1 > 2 2 2 > 3 3 1 > > Every cell is the number of correct responses (0 through 8) to a given task > under certain conditions (factors C en D) > > But if I want to do an ANOVA with items instead of subjects as a random > factor, how should my data matrix look like? I am pretty sure i did it > correct, but i would very much like to see that confirmed by anybody...
I assume by items you mean the 8 items that produced the scores from 0 to 8. The layout will depend on whether the same 8 items were used in all of the conditions, or if some of your conditions are between-item effects (e.g., concreteness, frequency). If the same 8 in all conditions, then you would have 8 cases with 3x2x2x5 = 60 scores for each. Probably not a very powerful analysis, which could be problematic if you were planning to combine the subject and item analyses (e.g., Min F'). If not the same 8 in all conditions, then you need to provide more information about the design of the study. 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 ============================================================================ ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================
