What is a central pattern generator?
a. A neural mechanism that guides movement on the basis of sensory feedback
b. A neural mechanism that produces an alternation between two movements
c. A neural network that produces a rhythmic pattern of motor action
d. An innate movement that, once triggered, continues automatically until its completion
C
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A problem with face-to-face interviews is that:
a. interviewer bias could be introduced. b. they are expensive. c. respondents may give different answers, depending on the sex, race, or appearance of the interviewer. d. all of these
During the excitement phase, the testicles increase in size, becoming up to ____
a. 20% larger c. 70% larger b. 50% larger d. 80% larger
Which body part will infants gain control over first?
a. head c. legs b. arms d. fingers
Where have both separation anxiety and stranger anxiety been observed?
a. Only in children who attend day care before age two b. Only in children in the United States c. Only with children reared by stay at home parents d. In a variety of cultures and care settings