Descriptor
| Control Groups | 1 |
| Educational Experiments | 1 |
| Educational Research | 1 |
| Effect Size | 1 |
| Experimental Groups | 1 |
| Literature Reviews | 1 |
| Meta Analysis | 1 |
| Methods Research | 1 |
| Research Methodology | 1 |
Author
| Adair, John G. | 1 |
Publication Type
| Information Analyses | 1 |
| Journal Articles | 1 |
| Reports - Research | 1 |
Education Level
Audience
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Peer reviewedAdair, John G.; And Others – Review of Educational Research, 1989
A descriptive analysis of research practices and a meta-analysis of control group effect sizes are used to address Hawthorne effects in educational experiments. The analysis of 86 studies and 256 treatment/Hawthorne/no-treatment control group effect size comparisons indicate that artifact controls have limited utility in dealing with the Hawthorne…
Descriptors: Control Groups, Educational Experiments, Educational Research, Effect Size
