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ERIC Number: ED455279
Record Type: Non-Journal
Publication Date: 2001-Apr
Pages: 20
Abstractor: N/A
Reference Count: N/A
Sample Characteristics and Measurement Reliability: An Empirical Exploration.
Fan, Xitao; Yin, Ping
The literature on measurement reliability shows the consensus that group heterogeneity with regard to the trait being measured is a factor that affects the sample measurement reliability, but the degree of such effect is not entirely clear. Sample performance also has the potential to affect measurement reliability because of its effect on the relative magnitude of error score variance. This paper empirically examines the effects of these two sample characteristics on measurement reliability. Two large extant data sets are used in the investigation. One set of data was for 50,000 students from the criterion-referenced Texas Assessment of Academic Skills, and the other was for 10,000 students from the norm-referenced Iowa Tests of Basic Skills. The results suggest that both group variability and group performance level affect measurement reliability, and measurement error tends to be smaller for high-performance samples than for low performance samples. (Author/SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Iowa Tests of Basic Skills; Texas Assessment of Academic Skills