Repeated Measures ANOVA- different results

[amymay]

I am a little confused and I hope someone can help me. These are the results I get if I just use one within-suject factor BUT......
Tests of Within-Subjects Contrasts
Measure: MEASURE_1
Source pn Sum of Squares df Mean Square F Sig.
pn Linear 113.288            1 113.288         36.768    .000
pn * condition 7.587            2  3.793         1.231      .299
Error(pn) Linear 178.708            58  3.081

These are the results if I use 2 within-subject factors... Why are the SS so different for the same variable? HELP
Tests of Within-Subjects Contrasts
Measure: MEASURE_1
Source   Sum of Squares df Mean Square F Sig.
pn              58.525 1 58.525          37.727 .000
pn * condition3.240 2 1.620           1.044 .358
Error(pn)     89.973 58 1.551
ci     33.393 1 33.393         26.771 .000
ci * condition4.964             2 2.482         1.990 .146
Error(ci)     72.347 58 1.247
pn * ci       8.537 1 8.537        5.850 .019
pn * ci * condition 3.311 2 1.655          1.134 .329
Error(pn*ci)   84.640 58 1.459


ANY HELP ON THIS WOULD BE BEYOND GREATLY APPRECIATED

[Swank, Paul R]

Perhaps we could be of more help if you gave us a little background on
what pn and c1 represent and what did you do about the ci factor in the
first analysis?

Paul R. Swank, Ph.D
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center
Houston, TX 77038


-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
amymay
Sent: Thursday, January 08, 2009 10:43 PM
To: [hidden email]
Subject: Repeated Measures ANOVA- different results

I am a little confused and I hope someone can help me. These are the
results
I get if I just use one within-suject factor BUT......
Tests of Within-Subjects Contrasts
Measure: MEASURE_1
Source  pn      Sum of Squares  df      Mean Square     F       Sig.
pn      Linear  113.288             1    113.288                 36.768
.000
pn * condition  7.587               2     3.793          1.231      .299
Error(pn)       Linear  178.708             58    3.081

These are the results if I use 2 within-subject factors... Why are the
SS so
different for the same variable? HELP
Tests of Within-Subjects Contrasts
Measure: MEASURE_1
Source   Sum of Squares df      Mean Square     F       Sig.
pn              58.525  1       58.525            37.727        .000
pn * condition3.240     2       1.620              1.044        .358
Error(pn)            89.973     58      1.551
ci           33.393     1       33.393           26.771 .000
ci * condition4.964                  2  2.482            1.990  .146
Error(ci)            72.347     58      1.247
pn * ci        8.537    1       8.537           5.850   .019
pn * ci * condition     3.311   2       1.655             1.134 .329
Error(pn*ci)   84.640   58      1.459


ANY HELP ON THIS WOULD BE BEYOND GREATLY APPRECIATED

--
View this message in context:
http://www.nabble.com/Repeated-Measures-ANOVA--different-results-tp21366
164p21366164.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD