ERIC Number: EJ272102
Record Type: Journal
Publication Date: 1982
Reference Count: N/A
A Meta-analysis of Pretest Sensitization Effects in Experimental Design.
Willson, Victor L.; Putnam, Richard R.
American Educational Research Journal, v19 n2 p249-58 Sum 1982
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)
Publication Type: Journal Articles; Reports - Research; Information Analyses
Education Level: N/A
Authoring Institution: N/A