Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 8

The most widely used series of IQ tests are the (a) _____. Intelligence Scales. These tests organize items into two subtests, which are called (b) _____ and (c) _____ scales. In an attempt to measure nonverbal skills and rule out cultural problems, Wechsler added the (d) _____ scale.