Through active niche-building, similarities within pairs of fraternal twins ____ as they mature from childhood to adulthood
a. weaken
b. remain stable
c. strengthen
d. become difficult to assess
A
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A key to the success of the time-out procedure is that it:
A. eliminates reinforcement of undesired behaviors B. induces fear that suppresses undesired behaviors C. is more intense than punishment D. can be administered more immediately than punishment
In a study of moral development, two groups of children (age three years and age six years) were tested repeatedly for four years. This is an example of a ________ study
a. sequential c. longitudinal b. cross-sectional d. combinatorial
Beckham is 18 months old. His parents want to encourage him to eat fruit. Which approach would be most effective in accomplishing this task using social referencing?
A) slowly nodding when Beckham eats fruit B) smiling and saying “Yummy!” when Beckham eats fruit C) frowning when Beckham does not eat fruit D) smiling and looking surprised when Beckham eats fruit
How many hours does the average two-year-old toddler sleep a day?
16 to 18 12 to 13 14 to 15 8 to 9