People who have learned to be helpless often suffer from

Cognitive development in children is the process by which

a. children perceive and mentally represent the world. b. intelligence is developed. c. children learn to imitate others. d. children learn strategies for developing short- and long-term memory.

Among his motivations for the development of the Wechsler scales of intelligence, was David Wechsler's belief that

a. one underlying mental ability was solely responsible for the concept of intelligence. b. a single intelligence score was the most appropriate measure of human intelligence. c. human intelligence was significantly influenced by nonintellectual factors. d. existing intelligence scales were adequate to measure the intelligence of all age groups.