Studies of animals exposed to extreme forms of sensory deprivation provide ample evidence that
A) operant learning plays a major role in early development.
B) sensitive periods in development exist.
C) developmental delays resulting from early life events cannot be overcome.
D) development proceeds according to the cephalocaudal and proximodistal trends.
B
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From the second through the eighth weeks, the developing human is referred to as a(n) ____
a. embryo c. blastocyst b. zygote d. ovum
A dynamic systems theorist who studies how infants learn to walk is likely to
A) focus on biological influences. B) highlight only social influences. C) study a wide variety of both biological and environmental influences. D) isolate the influence of the mesosystem.
After age 8, girls begin __________ at a faster rate than boys
A) accumulating fat B) adding muscle C) pruning synapses D) upper body growth
Marianne's baby is sitting up, crawling around, and beginning to stand with a little help. Her baby is most likely to be about ________ months of age
a. 6 b. 9 c. 12 d. 7