ERIC Number: ED314450
Record Type: Non-Journal
Publication Date: 1989-Nov-9
Reference Count: N/A
Comments on Better Uses of and Alternatives to Significance Testing.
Davidson, Betty M.; Giroir, Mary M.
Controversy over the proper place of significance testing within scientific methodology has continued for some time. The suggestion that effect sizes are more important than whether results are significant is presented. Effect size can be defined as an estimate of how much of the dependent variable is accounted for by the independent variables. Interpretations of statistical significance can be seriously incorrect when the researcher underinterprets an outcome with a large effect size that is nonsignificant or overinterprets an outcome that involves a small effect size but which is statistically significant. These problems can be avoided if the researcher includes effect size in result interpretation. It has been stated that statistical significance was never intended to take the place of replication in research. Researchers must begin drawing conclusions based on effect sizes and not statistical significance alone; and the replicability and reliability of results must be recognized, analyzed, and interpreted. Two tables illustrate effect sizes. (SLD)
Publication Type: Information Analyses; Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A