For children and adolescents, heritability estimates indicate that about half of the variance in their IQ scores is explainable by genetic differences

John Watson offered a live, white rat to Little Albert and then made a loud noise behind his head by striking a steel bar with a hammer. The white rat served as the ________ in his study

a. discriminative stimulus b. counterconditioning stimulus c. conditioned stimulus d. unconditioned stimulus e. extinguishing stimulus

Three-year-old Sam gets a lot of satisfaction out of scolding Gill, his pretend friend and imaginary playmate. Sam is in Piaget's ___________ stage of cognitive development

a. sensorimotor c. concrete operational b. preoperational d. formal operational