On Thu, 29 Jan 2004, Paige Miller wrote in part, in response to Bruce Weaver:
> I think it all boils down to terminology differences, as I can't argue > with your ANOVA table. I think of this as a full factorial in A and > B, with a blocking variable named "subject". Yes, that'a a logical way of looking at it (although probably not the first way of describing it that would leap to a psychologists's mind!). > As I said in my first post on this topic, I think of repeated measures > as you apply a "treatment" to an experimental unit, and then record > that experimental unit's value over time. For example, you give a drug > to a subject, then record a measurement of that subject at 1 day, 2 > days, 3 days, ... Perhaps that's an extremely narrow view of what > "repeated measures" is, but that's how I use the term. Exactly. In Archana's case, the experimental unit is a subject. Subject dons a garment, carries out some physical activity, and assorted variables are measured (whether before, during, or after the activity, or all three, was not specified). Subject sets this garment aside. After some time, subject then dons another garment, and the protocol is repeated. (Presumably enough time elapses between these repetitions for any lingering effects of the first activity -- fatigue, elevated heart rate, etc. -- to have dissipated; but this too was not specified.) This continues until all four garments have been used. Whether the interval between repetitions is one day, or more or less than a day, or even whether it's always the same interval, is probably irrelevant to the outcome, given that presumption. There may be some lurking issues about equivalence of garments, if a different set of garments is used for each subject. (A different set of issues -- having to do with laundering, e.g. -- arises if the same set of garments is used by all subjects, or even by more than one subject.) One gathers these issues are felt not to be important. -- DFB. ----------------------------------------------------------------------- Donald F. Burrill [EMAIL PROTECTED] 56 Sebbins Pond Drive, Bedford, NH 03110 (603) 626-0816 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
