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ERIC Number: EJ782126
Record Type: Journal
Publication Date: 2008
Pages: 9
Abstractor: Author
Reference Count: 18
ISBN: N/A
ISSN: ISSN-0013-1644
The File Drawer Problem in Reliability Generalization: A Strategy to Compute a Fail-Safe N with Reliability Coefficients
Howell, Ryan T.; Shields, Alan L.
Educational and Psychological Measurement, v68 n1 p120-128 2008
Meta-analytic reliability generalizations (RGs) are limited by the scarcity of reliability reporting in primary articles, and currently, RG investigators lack a method to quantify the impact of such nonreporting. This article introduces a stepwise procedure to address this challenge. First, the authors introduce a formula that allows researchers to estimate the lower bound population average reliability for a desired instrument. Second, they present an equation to determine the Fail-Safe N for RG. This equation estimates the number of "file drawer" studies required to drop the aggregate score reliability of an instrument below a specified criterion value. Finally, the authors demonstrate the utility of these equations using published RG studies. Comments on the conclusions drawn from each RG application are provided.
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: Researchers
Language: English
Sponsor: N/A
Authoring Institution: N/A