It is almost self-evident that test results will be unreliable and misleading if those undergoing assessments do not make a full effort on testing. Nevertheless, objective tests of effort have not typically been used with young adults to determine whether test results are valid or not. Because of the potential economic and/or recreational benefits…

AS ONE PHASE OF RESEARCH IN APPLIED ANTHROPOLOGY, YAQUI INDIAN AND MEXICAN MEN IN ARIZONA HAVE PARTICIPATED FOR THREE YEARS IN EXPERIMENTAL PROGRAMED COURSES IN BASIC ENGLISH AND ARITHMETIC. THE STUDENTS HAD PREVIOUSLY HAD AN AVERAGE OF FIVE YEARS' FORMAL SCHOOLING. A BATTERY OF STANDARD OBJECTIVE TESTS WAS GIVEN TO MEASURE IQ AND ABILITY TO READ…