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ERIC Number: EJ859307
Record Type: Journal
Publication Date: 2009
Pages: 13
Abstractor: As Provided
Reference Count: 17
ISSN: ISSN-0021-8855
Assessing Observer Accuracy in Continuous Recording of Rate and Duration: Three Algorithms Compared
Mudford, Oliver C.; Martin, Neil T.; Hui, Jasmine K. Y.; Taylor, Sarah Ann
Journal of Applied Behavior Analysis, v42 n3 p527-539 Fall 2009
The three algorithms most frequently selected by behavior-analytic researchers to compute interobserver agreement with continuous recording were used to assess the accuracy of data recorded from video samples on handheld computers by 12 observers. Rate and duration of responding were recorded for three samples each. Data files were compared with criterion records to determine observer accuracy. Block-by-block and exact agreement algorithms were susceptible to inflated agreement and accuracy estimates at lower rates and durations. The exact agreement method appeared to be overly stringent for recording responding at higher rates (23.5 responses per minute) and for higher relative duration (72% of session). Time-window analysis appeared to inflate accuracy assessment at relatively high but not at low response rate and duration (4.8 responses per minute and 8% of session, respectively). (Contains 3 figures.)
Society for the Experimental Analysis of Behavior. Available from: Department of Applied Behavioral Science. Kansas University, 1000 Sunnyside Avenue, Lawrence, KS 66045-2133. Tel: 785-841-4425; Fax: 785-841-4425; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: Adult Education; Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: New Zealand