ERIC Number: ED420687
Record Type: Non-Journal
Publication Date: 1998-Jan
Reference Count: N/A
Interpreting Differences between Mean ACT Assessment Scores. ACT Research Report Series 98-1.
This report examines both the substantiveness and statistical significance of differences between mean American College Testing (ACT) Program assessment scale scores. The first part of the report describes the development and results of a method for interpreting the substantiveness of mean differences in terms of test items correctly answered. For example, if Group A has a mean ACT Composite scale score of 20.9 and Group B has a mean Composite scale score of 21.0, then each student in Group B has correctly answered either one more item on the English test or one more item on the Mathematics test, relative to students in Group A. In the second part of this report, several methods for interpreting ACT Assessment mean differences, including the method above, are applied to sample data. Data used in this study consist of 10% systematic random samples of ACT-tested students from the high school graduating classes of 1994, 1995, and 1996. (Contains 8 tables, 1 figure, and 11 references.) (Author/SLD)
Descriptors: College Entrance Examinations, High School Students, High Schools, Scores, Statistical Significance, Tables (Data), Test Items, Test Results
ACT Research Report Series, P.O. Box 168, Iowa City, IA 52243-0168.
Publication Type: Reports - Evaluative
Education Level: N/A
Authoring Institution: American Coll. Testing Program, Iowa City, IA.
Identifiers - Assessments and Surveys: ACT Assessment