Tag Archive for: scientific studies


Can you trust the latest findings? It depends….

by Jean Rhodes In a recent review of meta-analyses, researchers Alan Cheung and Robert Slavin found that certain types of evaluations yielded larger effect sizes than others. Larger effects emerged in studies where the researchers created their own questionnaires, instead of relying on well-validated questionnaires. Homegrown questionnaires might include items that are very specific to the knowledge and […]