What does the science of human development seek to understand?
A. how and why people change over time
B. the meaning of life
C. the works of Freud, Piaget, and Erikson
D. theories that have not been subjected to scientific testing
A. how and why people change over time
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"It's noon, so it's time to eat." This person illustrates the role of ____ in hunger.
A. PYY B. genetic factors C. learned associations D. leptin
When an observer records the three-term-contingency, this is called ___________
Fill in the blank(s) with correct word
Which theory best explains the finding that parents' lifespans predict those of their children, and identical twins share more similar lifespans than do fraternal twins?
A. aging immune system B. cellular mutation C. programmed genetics D. free radicals
Children generally speak their first word when they are approximately:
a. 3 months of age b. 6 months of age c. 2 years old d. 12 months of age