_____ are to panic disorder as _____ are to obsessive-compulsive disorder

What has research on the effectiveness of Head Start revealed?

a. long-term increases in IQ levels b. no reduction in cultural-familial intellectual disability c. short-term increases in IQ and academic achievement d. improved health but no differences in academic performance

Which type of theorist would be most likely to describe intellectual development in terms of qualitative changes in thought with age (e.g., transformation from a caterpillar to a butterfly)?

a. A Piagetian b. A Vygotskyian c. An information-processor d. A psychometrician