```Date: Mon, 3 Apr 2006 14:04:09 -0600 Reply-To: Matthew Pirritano Sender: "SPSSX(r) Discussion" From: Matthew Pirritano Subject: Re: Difference between MANOVA and Repeated-Measures MANOVA In-Reply-To: <6250203B042D8349A920AA610383093601106726@UTHEVS3.mail.uthouston.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed The variables are all in the same scale. Does that mean to Repeated Measures would work? I believe that in calculating the between-subjects effect repeated measures just compares the between-subjects factor across the average of the repeated measures. Is that correct? Of course, in addition to this the repeated measures manova also tells you if your between subjects effect varies as a function of your multivariate DV. When it says that the effect varies as a function of the DV how is this determined. Is it just a comparison of the univariate effects across the different levels of the DV? Since the main variable of interest here is the between-subjects effect it's still unclear to me which makes more sense, straight manova or repeated measures. A comparison across the average dv (repeated measures) seems more interpretable than comparing across the root that best fits the dvs. The data involves the comparing of the amount of care given to a child by mom with the amount of care by dad. The four variables are measuring different aspects of the construct of care. Along this same line, the researcher had wanted to look at what I've been calling the between-subjects factor "parent" as a within-subjects factor, because they relate to the same kid. I didn't think this made sense. They are after all two different people. If we could consider parent a within-subjects factor than we could look at the within-subjects effect of parent. Any thoughts. Any references. This is a bit beyond my understanding. Thanks Matt Matthew Pirritano, Ph.D. National Science Foundation Post-Doctoral Fellow College of Education Department of Individual, Family & Community Education MSC05 3040 1 University of New Mexico Albuquerque, NM 87131-0001 Telephone (505)277-7115 FAX (505)277-8361 Swank, Paul R wrote: > If the variables are measurng the same construct but are not in the same > scale then MANOVA is the best approach. Different scales will make the > interpretation of the differences between scales problematic, unless you > are interested in a profile analysis. I that case we would only be > interested in parallelness. > > > Paul R. Swank, Ph.D. > Professor, Developmental Pediatrics > Director of Research, Center for Improving the Readiness of Children for > Learning and Education (C.I.R.C.L.E.) > Medical School > UT Health Science Center at Houston > > -----Original Message----- > From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of > Zdaniuk, Bozena > Sent: Monday, April 03, 2006 11:27 AM > To: SPSSX-L@LISTSERV.UGA.EDU > Subject: FW: Re: Difference between MANOVA and Repeated-Measures MANOVA > > If I may have an opinion here, I think you have a regular MANOVA > (multiple variables from the same subjects) but not Repeated Measures > MANOVA. Am I wrong? > b. > > Bozena Zdaniuk, Ph.D. > > University of Pittsburgh > > UCSUR, 6th Fl. > > 121 University Place > > Pittsburgh, PA 15260 > > Ph.: 412-624-5736 > > Fax: 412-624-4810 > > email: bozena@pitt.edu > > > -----Original Message----- > From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of > Matthew Pirritano > Sent: Monday, April 03, 2006 12:07 PM > To: SPSSX-L@LISTSERV.UGA.EDU > Subject: Re: Difference between MANOVA and Repeated-Measures MANOVA > > The four repeated measures in this case are different measures of > parental care. So, while they are not the same measure repeated at > different points in time I thought it would make more sense to use > repeated measures MANOVA as opposed to a MANOVA. > > Thanks > Matt > > Matthew Pirritano, Ph.D. > National Science Foundation Post-Doctoral Fellow College of Education > Department of Individual, Family & Community Education > MSC05 3040 > 1 University of New Mexico > Albuquerque, NM 87131-0001 > Telephone (505)277-7115 > FAX (505)277-8361 > > > > > Fredric E. Rose, Ph.D. wrote: > >> It would depend on what those 4 measures are. If they are the same >> > thing > >> (say, aggressive acts at different times or under different >> > conditions), > >> then a 2 (mother vs father) x 4 (condition/time) mixed ANOVA with >> > condition > >> as the repeated measure would be the way to go. If, however, the >> > measures > >> are different, such as parental attitude, # of negative comments made, >> > > >> aggression frequency, and empathy score, then a MANOVA would be the >> > way to > >> go. The main issue is whether the DV is the same "thing" or >> > different. > >> F >> >> >> On 3/31/06 2:33 PM, "Matthew Pirritano" wrote: >> >> >> >>> Say I have four measures on a mother, and the same four measures on >>> > the > >>> father. Being that I have four measures on a person I think that I >>> > have > >>> repeated-measures. I have sample of 100 mothers, and 100 fathers. I >>> > > >>> want to compare mom and dad on these four measures. Does it make >>> > more > >>> sense to do a MANOVA or a Repeated-Measures MANOVA, and why? >>> >>> Thanks >>> Matt >>> >>> Matthew Pirritano, Ph.D. >>> National Science Foundation Post-Doctoral Fellow College of Education >>> > > >>> Department of Individual, Family & Community Education >>> MSC05 3040 >>> 1 University of New Mexico >>> Albuquerque, NM 87131-0001 >>> Telephone (505)277-7115 >>> FAX (505)277-8361 >>> >>> >> ```

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