Ida is playing on her play mat one day when she accidentally rolls onto a toy that squeaks. She loves the sound so much that she keeps rolling so the sound continues. Which stage would Piaget say she was in?

Cattell's research on personality was based on the earlier work of __________ and

involved __________. a. Galen; humors b. Eysenck; case studies c. Mischel; experiments d. Allport; factor analysis e. Freud; case studies

Jason is 9 years old. He has a negative attitude, has regular standoffs with his parents,

teachers, and coaches, and frequently is mean to other children. The DSM-IV-TR behavioral disorder Jason's behavior describes is __________ . Fill in the blanks with correct word