Current Wentzville, Missouri Population, Demographics and stats in 2016, 2017.
David Wechsler. developed an intelligence test for adults in the US (WAIS), an intelligence test for children (WISC, which has been revised and is now the WISC-IV), and an intelligence test for preschool (WPPSI).
The answer, based on. decades of intelligence research, is an. unequivocal yes. No matter their form. or content, tests of mental skills invari-. ably point to the existence of a global. factor that permeates all aspects of cog-. nition.