Although there seems to be widespread agreement that new approaches to studying intelligence should combine the differential and cognitive (information processing) approaches in isolating components of intelligence, researchers disagree about how the approaches should be combined and, consequently, about how elementary components of intelligence…

Progress, or lack thereof, in the development of ability testing is reviewed. Current tests, though inadequate, respond to the demands of test consumers. Test publishers must look ahead to changing demands and begin to lead the market, rather than follow it, by drawing on basic research in testing. (SLD)