Accession Number : AD0432284


Title :   RIGOROUSLY AND NONRIGOROUSLY PARALLEL TEST FORMS,


Corporate Author : EDUCATIONAL TESTING SERVICE PRINCETON N J


Personal Author(s) : Lord,Frederic M


Report Date : Feb 1964


Pagination or Media Count : 21


Abstract : When several test forms are used interchangeably, they will not in practice, despite all efforts, be rigorously parallel. A definition of the standard error of measurement appropriate for this type of situation can be provided; however, it must be different from the definition in classical test theory. Appropriate formulas for the standard error of measurement and for other related quantities under both definitions are derived and compared; also sample statistics for estimating these quantities. (Author)


Descriptors :   *TEST CONSTRUCTION(PSYCHOLOGY) , ERRORS , STANDARDS , MEASUREMENT , MATHEMATICAL MODELS , MATHEMATICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE