A Meta-analysis of Pretest Sensitization Effects in Experimental Design.

Authors :: Willson, Victor L.
Putnam, Richard R.
Source :: American Educational Research Journal. Sum 1982 19(2):249-258.
Publication Year :: 1982
Abstract: A meta-analysis of outcomes from 32 studies investigating pretest effects was conducted. For all outcomes the average effect size was +.22, indicating an elevating effect of pretest on posttest. Duration of time between pre- and posttesting was also related to effect size. Researchers should continue to include pretest as a design variable. (Author/LC)

Language :: English
Volume :: 19
Issue :: 2
Database :: ERIC
Journal :: American Educational Research Journal
Publication Type :: Academic Journal
Accession number :: EJ272102
Document Type :: Journal Articles<br />Reports - Research<br />Information Analyses