Research has found that the degree of cross-modal transference by an infant at age 1 is ____________ with intelligence scores several years later

Sol is investigating the effects of divorce on children's self-esteem. His initial sample consists of a group of 10 five-year-olds, which he plans to follow over a period of at least 15 years. When this group of children reaches age 15, Sol adds a second group of five-year-olds to his study, and plans to follow them for another 15 years. Sol's overall plan is best classified as a _____ research

design. a. correlational b. cross-sectional c. longitudinal d. sequential

Twenty-month-old Hannah realizes that her mother still exists even when Hannah cannot see her. What cognitive achievement has Hannah mastered?

a. egocentrism b. object permanence c. conservation d. animistic thinking e. centration