In an early experiment by Cannon and Washburn, Washburn swallowed a balloon so that
a. the balloon could prevent hunger by filling up the stomach.
b. the balloon could be inflated and allow the recording of stomach contractions.
c. the balloon would stop digestion, allowing the stomach to be examined.
d. hunger could be controlled by controlling the stomach contractions.
b
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The range of p (difficulty index) on a set of items comprising a four-option multiple-choice test
should be approximately A) .40 to .80. B) -1.00 to 1.00. C) .00 to 1.00. D) .10 to .90.
In one study, researchers showed infants moving circles, moving circles with scrambled facial features, and moving circles with regular facial features. The researchers measured eye gazes at the objects and found that infants tracked the:
A) empty circles for the longest time. B) scrambled faces for the longest time. C) regular faces for the longest time. D) scrambled and regular faces for an equivalent amount of time.