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ERIC Number: EJ1001867
Record Type: Journal
Publication Date: 2013-Apr
Pages: 13
Abstractor: As Provided
ISSN: ISSN-0022-4405
Reliability of Multi-Category Rating Scales
Parker, Richard I.; Vannest, Kimberly J.; Davis, John L.
Journal of School Psychology, v51 n2 p217-229 Apr 2013
The use of multi-category scales is increasing for the monitoring of IEP goals, classroom and school rules, and Behavior Improvement Plans (BIPs). Although they require greater inference than traditional data counting, little is known about the inter-rater reliability of these scales. This simulation study examined the performance of nine reliability indices applied to six multi-category scales of different gradations (2, 3, 5, 7, 10, and 15 points) all derived from the same quasi-continuous (1-30) data. The researchers find that each index behaves differently and requires its own interpretation; there is no one-best reliability indices as most indices are scale-dependent. Finally, index values do not remain constant when more categories are collapsed to fewer. New guidelines are needed for optimal methods of obtaining reliability with ordinal scales. (Contains 2 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: Elementary Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A