Question 7

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Of the following, which motor activity typically develops first?

	sits alone
	grasps a cube
	plays pat-a-cake
	crawls

Question 8

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During infancy ________. These sex differences will ________ during adolescence.

	boys are slightly shorter and lighter; disappear
	boys are slightly shorter and lighter; be greatly magnified
	girls have a higher ratio of fat to muscle than do boys; disappear
	girls have a higher ratio of fat to muscle than do boys; be greatly magnified

Question 9

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When the ________ is repeatedly presented without being paired with the ________, ________ occurs.

	neutral stimulus; conditioned stimulus; extinction
	conditioned stimulus; unconditioned stimulus; learning
	conditioned stimulus; unconditioned stimulus; extinction
	neutral stimulus; conditioned stimulus; learning

Question 10

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Infants with severe visual impairments are not motivated to move on their own until

	"reaching on sound" is achieved.
	their parents push them to do so.
	they have received extensive orientation and mobility training.
	they receive vision correction through eyeglasses or surgery.

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