Which of the following statements about changes in vision in adulthood is true?
A) The lens narrows and becomes more elastic.
B) Color discrimination improves.
C) The muscles controlling the pupil weaken.
D) Visual acuity increases.
C
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The three Humean variables, which lead people to infer that events are causally related, are ___
a. planning, precedence, and covariation b. consistency, contiguity, and covariation c. contiguity, precedence, and covariation d. planning, precedence, and consistency
Suppose that a seven-month-old infant is repeatedly shown a film in which an actor, who is holding an object in his hand, opens his hand to release the object, and the object falls to the ground
After infants habituate to this event, they will dishabituate to a film in which ___. a. the actor does not open his hand, but the object falls to the ground anyway b. the object does not start falling until 3/4 of a second after the actor opens his hand c. both a and b d. neither a nor b