Accession Number : ADP007101

Title :   TESTGRAF: Some Graphics Tools for the Analysis of Examination Data,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC) DEPT OF PSYCHOLOGY

Personal Author(s) : Ramsay, J. O.

Report Date : 1992

Pagination or Media Count : 4

Abstract : TESTGRAF is a program designed to graph the performance of examination questions in a way meaningful to statistically naive examiners. It was developed with the college or university instructor in mind who has given a multiple choice exam to a class of a hundred or more students, and who wants to evaluate test items with a view to deciding whether or use or reject an item in determining the final grade, getting information that will help in the rewriting of items for future use, identifying items which might be added to a pool for constructing subsequent exam, determining aspects of student performance on the test as a whole. The program also generates examinee ability estimates which are optimal in the sense that they use the substantial information provided by which wrong options were chosen for incorrectly answered questions. The ability estimates are also optimal in a statistical sense (maximum likelihood conditional on item characteristics), and thus automatically weight test items by their efficiencies. These ability estimates are therefore substantially more efficient than the traditional percentage correct estimates. TESTGRAF also-has a module aimed at showing examinees how much information is provided by the exam about their ability or proficiency in the subject being tested.

Descriptors :   *COMPUTER GRAPHICS, MAXIMUM LIKELIHOOD ESTIMATION, CURVES(GEOMETRY), STATISTICAL DECISION THEORY, EFFICIENCY, ESTIMATES, GRAPHS, INSTRUCTORS, PROFICIENCY, SELECTION, STUDENTS, TEST AND EVALUATION, WEIGHT.

Subject Categories : Statistics and Probability
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE