Accession Number : AD0682238

Title :   A PROGRAM FOR ESTIMATING A BIVARIATE DISTRIBUTION OF TEST scores from the marginals.

Descriptive Note : Technical rept.,

Corporate Author : EDUCATIONAL TESTING SERVICE PRINCETON N J

Personal Author(s) : Stocking,Martha ; Lees,Diana M. ; Lennon,Virginia ; Lord,Frederic M.

Report Date : JAN 1969

Pagination or Media Count : 19

Abstract : Using the output from another program this program computes the estimated bivariate distribution of observed scores between two tests measuring the same psychological trait. If desired, this estimated distribution is compared to an actual bivariate observed-score distribution provided by the user. The program can be used (1) to check on the mathematical model used to estimate the true-score distributions; (2) to estimate how a group of examinees that has taken only a short form of a test would have performed on a long form (this is useful in setting up test norms); (3) to estimate how a group of examinees that has been selected on a certain test would perform on a parallel test; (4) to investigate whether or not two different tests measure the same psychological trait. The program is written in FORTRAN IV for the IBM-7044. (Author)

Descriptors :   (*PSYCHOLOGICAL TESTS, COMPUTER PROGRAMMING), STATISTICAL DISTRIBUTIONS, CORRELATION TECHNIQUES, MATHEMATICAL MODELS, PERFORMANCE(HUMAN)

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE