When can infants usually sit up by themselves (without assistance)?
a. By about 3 months
b. Not until 9-10 months
c. As soon as they are old enough to lift their heads and torsos off the ground
d. Usually around 7 months
d
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Social comparison, normative influence, and social decision schemes are all causes of group polarization.
a. True b. False
Edgar Adrian studied the relationship between nerve firing and sensory experience by measuring how the firing of a neuron from a receptor in the skin changed as he applied more pressure to the skin. He found that
A. the shape and height of the action potential increased as he increased the pressure. B. the shape and height of the action potential decreased as he increased the pressure. C. the rate of nerve firing increased as he increased the pressure. D. the rate of nerve firing decreased as he increased the pressure.
Nightmares occur during ______ sleep
a. stage 1 c. stage 4 b. stage 2 d. REM
Systematic desensitization has been used effectively as a treatment for vaginismus in females
Indicate whether the statement is true or false