Scores on Raven's Progressive Matrices correlated positively with electroencephalogram-recorded alpha rhythm frequency (AF) in 101 healthy male adults, as did one test of verbal ability and one of mental performance. However, AF did not show significant relationships with general intelligence or spatial and arithmetic abilities. (SLD)

THE THREE MAIN PURPOSES OF THIS RESEARCH IN PROBLEM-SOLVING WERE (1) TO EVALUATE GROUP PERFORMANCE VERSUS PERFORMANCE NORMS BASED ON THE PROPERTIES OF THE PROBLEM, (2) TO STUDY INDIVIDUAL PERFORMANCE, AND (3) TO INVESTIGATE THE EFFECT THAT A PARTICULAR EDUCATIONAL LEVEL HAS ON THE PERFORMANCE OF THESE PROBLEMS. THE SUBJECTS USED CONSISTED OF A…