Which of the following studies would be impossible to answer by a cross-sectional study?
a. How many 6-year-olds and 12-year-olds have friends of the opposite sex?
b. How do 6-year-olds and 12-year-olds react when a friend becomes abusive?
c. Do 12-year-olds generally have more friends, or fewer, than 6-year-olds?
d. Do children with many friends at age 6 also have many friends at age 12?
d
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According to Piaget, the ability to understand that simply changing the appearance of an object does not change the object's nature is known as __________
a) object permanence. b) conservation. c) centration. d) reversibility.
The ability of newborns to imitate the facial expressions of other people ______
a. is an inborn, instinctive skill that equips them to bond with adults b. is evidence of the earliest learning yet discovered in infants c. appears to be a primitive reflex d. appears to be based on complex cognitive processing that, until recently, was not thought possible in young infants
In a situation where an expressive person is trying to hide his or her emotions and an unexpressive person is acting naturally,
A) generally, the expressive person still shows more emotion. B) generally, they act about the same. C) generally, the unexpressive person now shows more emotion. D) neither one shows any emotion.
Klinefelter's syndrome occurs ______
a. only in females b. only in males c. in equal proportions among males and females d. twice as frequently in females