ERIC Number: ED219428
Record Type: RIE
Publication Date: 1982-Mar
Reference Count: 0
Properties of a Proposed Approximation to the Standard Error of Measurement.
Nitko, Anthony J.
An approximation formula for the standard error of measurement was recently proposed by Garvin. The properties of this approximation to the standard error of measurement are described in this paper and illustrated with hypothetical data. It is concluded that the approximation is a systematic overestimate of the standard error of measurement computed in the usual way with Kuder-Richardson formula 20. The relative error of the approximation was small for tests of more than 20 items. However, for short, internally consistent tests of the type used in instructional programs, the relative error can be quite large. (Author/BW)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers: Garvin (A D)
Note: Paper presented at the Annual Meeting of the National Council on Measurement in Education (New York, NY, March 20-22, 1982).