Use unadjusted variances to estimate the SD for effect sizes in ANCOVA.
They are more meaningful.
Paul R. Swank, Ph.D.
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center - Houston
-----Original Message-----
From: SPSSX(r) Discussion [mailto:
[hidden email]] On Behalf Of
Anton
Sent: Friday, February 29, 2008 10:37 AM
To:
[hidden email]
Subject: Calculating Cohen's D from ANCOVA results
Dear Listers-
I like to know the proper way to compute Cohen's D using the adjusted
means
from ANCOVA results. Can I convert the standard errors of the adjusted
means into variances or should I simply use the unadjusted variances?
Thanks, in advance.
Anton
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