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ERIC Number: ED453248
Record Type: Non-Journal
Publication Date: 2001-Apr-14
Pages: 22
Abstractor: N/A
Reference Count: N/A
The Introduction of a Measure of Instrument Homogeneity for Interpreting Low Reliability Coefficients.
Roberts, J. Kyle; Onwuegbuzie, Anthony J.; Eby, J. Robert
This paper suggests that although data from a homogenous sample might yield less reliable scores than did an inducted sample, these data should not be discarded until further examination of the data is conducted. The paper presents two statistics for monitoring data homogeneity and one statistic for correcting alpha when homogeneity is large. The first of the statistics for monitoring sample homogeneity is computed as the difference in mean item variances, expressed as a percentage. The second monitoring statistic is termed the "relative squared standard error of estimate index" (J. Roberts and A. Ongwuegbuzie, 2000). The new statistic for correcting alpha is developed for the situation in which the homogeneity is large and access to a previously normed sample is not available. The use of all three techniques is illustrated. (Contains 3 tables and 12 references.) (SLD)
Publication Type: Reports - Descriptive; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A