EDCI 3301 Lecture Notes - Lecture 4: Criterion Validity, Standardized Test, Standard Score
15 Aug 2019
Department
Course
Professor
Document Summary
For achievement tests - the extent to which there is a close match between the items on a test and a reasonable table of specifications supports claims for content validity. Tests measuring abstract constructs or student traits - validity is a matter of whether one agrees with the test developers" definition of the construct and interpretation of research studies which examine the underlying measurement effectiveness of these tests. Aptitude tests - the relevant validity argument is clear; criterion validity is most compelling. Long tests are almost always very reliable in terms of internal reliability. When some part of a test is scored and interpreted, this is another reliability concern; reliability estimates for the long test do not transfer to the shorter test. Z scores are raw scores that have been transformed so that the distribution is such that the mean score is 0 and the standard deviation is 1.
