ERIC Number: ED397075
Record Type: Non-Journal
Publication Date: 1995-Jul
Reference Count: N/A
Estimating Reliability for Tests Composed of Item Sets.
Lawrence, Ida M.
This study examined to what extent, if any, estimates of reliability for a multiple choice test are affected by the presence of large item sets where each set shares common reading material. The purpose of this research was to assess the effect of local item dependence on estimates of reliability for verbal portions of seven forms of the old and seven forms of the new Scholastic Aptitude Test, where the new test contains larger item sets associated with reading passages. Estimates based on a single administration of the test (estimates based on internal consistency and estimates based on covariances among parts) were compared to estimates based on two administrations of the test. When adjusted for a fixed standard deviation, estimates based on covariances among parts tended to be similar to estimates based on parallel forms. Both types of estimates were lower than the internal consistency estimates. (Contains 3 figures, 5 tables, and 12 references.) (Author/SLD)
Publication Type: Reports - Evaluative
Education Level: N/A
Sponsor: College Entrance Examination Board, New York, NY.
Authoring Institution: Educational Testing Service, Princeton, NJ.
Identifiers - Assessments and Surveys: SAT (College Admission Test)