In young children, a lack of iodine inhibits cognitive development, resulting in an estimated IQ deficiency of ____ points

Which of the following theorists placed the greatest emphasis on unconscious experience as an important influence in development?

a. Sigmund Freud b. Erik Erikson c. Jean Piaget d. Lev Vygotsky

Which of the following is the perceptual principle involving the nearness in time and space and which is often responsible for the perception that one thing has caused another?

a. closure b. continuation c. figure-ground d. contiguity