Which statement is correct regarding leptin?
A. Ob mice lack the gene that codes for ghrelin.
B. Leptin produces a decrease in metabolic rate.
C. Leptin stimulates eating.
D. Leptin levels in the blood are maintained by fat cells in the body
Answer: D
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When parent and child work together to manage the child’s behavior and responsibilities, this is termed _________
a. social comparison b. the zone of proximal development c. gatekeeping d. co-regulation
Psychologists favor the lifespan approach to development because
a. it illustrates that the changes during late adulthood are even more dramatic than the changes during infancy. b. the research techniques are more valid than when other approaches are used. c. it demonstrates that the cognitive changes between infancy and old age are relatively minor. d. it emphasizes that people continue to develop through out their lifetime.
In the middle-class sample population usually studied, about _______ of the kind of intelligence that produces high IQ scores in children is heritable
a. half b. one-quarter c. two-thirds d. 95 percent
Only children __________ than children with siblings
A) do poorer in school B) are somewhat closer to their parents C) have lower achievement motivation D) have fewer close, high-quality friends