A study of the responses made to problems selected from Raven's Progressive Matrices showed differences in the kinds of errors typically made by eighteen-year-old students. Nine problems were used and the 68 subjects were told to draw their answers on the answer sheets. There were two trials per puzzle. A classification system, devised for errors,…

The development of psychological methods for assessing the abilities of deaf students could aid in the formation of educational programs and the provision of vocational guidance. A battery of tests designed to measure a wide range of functions was administered to all eighth grade students, average age 15, in schools for the deaf in Sweden. All…