ERIC Number: ED111758
Record Type: RIE
Publication Date: 1975
Reference Count: 0
Statistical Considerations for Establishing CBTE Cut-Off Scores.
Trzasko, Joseph A.
This report gives the basic definition and purpose of competency-based teacher education (CBTE) cut-off scores. It describes the basic characteristics of CBTE as a yes-no dichotomous decision regarding the presence of a specific ability or knowledge, which necesitates the establishment of a cut-off point to designate competency vs. incompetency on stated objectives. Statistical considerations for establishing CBTE cut-off scores are reviewed, and, based on test scores, two types of classification errors are identified. These are false acceptance, i.e., nonmasters erroneously classified as masters; and false rejection, i.e., masters erroneously classified as nonmasters. The report recommends that cut-off scores should not be arbitrarily established, but should be based on decision theory, the goal of which is to increase correct rate and decrease error rate. It was found that increasing the cut-off score will decrease false acceptance error and increase false rejection error, while decreasing the cut-off score will decrease false rejection error and increase false acceptance error. It was concluded that since shifting cut-off points reduces one error at the expense of the other, the direction of shift should be in the direction of the less serious error (false rejection). Numerous figures and tables are included. (BD)
Descriptors: Competency Based Teacher Education, Cutting Scores, Decision Making, Performance Criteria, Reliability, Statistical Analysis, Test Construction
Joseph A. Trzasko, Ph.D., Department of Psychology, Mercy College, Dobbs Ferry, New York 10522 (No price quoted)
Publication Type: Reports - Research
Education Level: N/A
Authoring Institution: N/A