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ERIC Number: EJ879423
Record Type: Journal
Publication Date: 2010
Pages: 11
Abstractor: As Provided
Reference Count: 31
ISBN: N/A
ISSN: ISSN-0022-4669
Comparison of Overlap Methods for Quantitatively Synthesizing Single-Subject Data
Wolery, Mark; Busick, Matthew; Reichow, Brian; Barton, Erin E.
Journal of Special Education, v44 n1 p18-28 2010
Four overlap methods for quantitatively synthesizing single-subject data were compared to visual analysts' judgments. The overlap methods were percentage of nonoverlapping data, pairwise data overlap squared, percentage of data exceeding the median, and percentage of data exceeding a median trend. Visual analysts made judgments about 160 A-B data sets selected randomly from the "Journal of Applied Behavior Analysis." The four overlap methods were compared for data sets in which all visual analysts agreed a change in data occurred or a change did not occur across conditions. Each overlap method had unacceptably high levels of errors. Given the findings and weaknesses of the overlap methods, their use should be abandoned. The desirable characteristics of a quantitative synthesis method are described. (Contains 4 figures and 3 tables.)
SAGE Publications and Hammill Institute on Disabilities. 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 - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A