ERIC Number: ED079322
Record Type: RIE
Publication Date: 1973
Reference Count: 0
Four Indices for Investigating Inter-Observer Accuracy of Observational Instruments.
Swan, William W.
Four indices for investigating inter-observer accuracy in observational instruments (contingency coefficient, Scott's pi, Bernstein's coefficient, and percent agreement) are reviewed concerning their assumptions, formulation, and tables indicating numerical functioning. Three of the four indices (excluding the contingency coefficient) are compared by computing each for four sets of observational data. It was found that Bernstein's coefficient had the highest median and the smallest range, percent agreement the second highest median and the second smallest range, and Scott's pi the lowest median and the largest range. It is hoped that authors will employ this information in their practical application and interpretation of these indices. (Author)
Publication Type: N/A
Education Level: N/A
Sponsor: Bureau of Education for the Handicapped (DHEW/OE), Washington, DC.
Authoring Institution: Rutland Center, Athens, GA.
Note: Paper presented at a joint session of the Annual Meeting of the American Educational Research Association and the National Council for Measurement in Education (New Orleans, Louisiana, February 25-March 1, 1973)