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ERIC Number: EJ915356
Record Type: Journal
Publication Date: 2011
Pages: 16
Abstractor: As Provided
Reference Count: 43
ISSN: ISSN-0022-0973
A Binomial Test of Group Differences with Correlated Outcome Measures
Onwuegbuzie, Anthony J.; Levin, Joel R.; Ferron, John M.
Journal of Experimental Education, v79 n2 p127-142 2011
Building on previous arguments for why educational researchers should not provide effect-size estimates in the face of statistically nonsignificant outcomes (Robinson & Levin, 1997), Onwuegbuzie and Levin (2005) proposed a 3-step statistical approach for assessing group differences when multiple outcome measures are individually analyzed within the same study. One suggested Step 3 strategy was to conduct a binomial (or "sign") test of the number of between-group outcome mean differences that are in the same direction. However, because multiple measures within a study typically are correlated, the binomial test's independence assumption will be violated. In the present investigation, the authors (a) performed a Monte Carlo simulation study to assess the Type I error behavior of the binomial test under varying degrees of independence-assumption violations, resulting in a table of adjusted critical values; and (b) illustrated use of this table by applying its adjusted critical values to a real research example. (Contains 3 tables and 5 footnotes.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Israel
Identifiers - Assessments and Surveys: Child Behavior Checklist