The functions that IQ and aptitude tests now serve in schools and the trends that may modify the present pattern of test use are presented. Current research on intelligence and aptitude and the kind of intelligence tests that might prove more useful in instructional planning are also discussed. (Author/RD)

A comparison was made of ability and achievement test results and school grades for 323 pairs of Swedish male and female twins and 740 controls in relation to social background. An interaction effect of sex and social background was found for verbal ability and mathematics test results. (SLD)