David wants to look at genetic influences on IQ, so he administers a battery of tests to Frank and Fred, who are fraternal twins; Sidney and Sheldon, who are identical twins; and Larry and Harry, who are non-twin brothers. David's supervisor asks him to make a guess about which set of siblings will most likely have the most similar IQs. David's best guess would be

In class you learned that children who are praised for their intelligence on easy problems are more likely to think things like _________ when they encounter difficulties.

a. "I am smart, so I can do what I set my mind to" and "I won't let difficulties stop me" b. "People are judging me" and "I better not make a mistake" c. "I can learn from mistakes" and "I want opportunities to learn" d. "I can get help from other people" and "I need to try some new strategies"

An infant who displays separation anxiety and stranger anxiety is considered

A) to have no emotional attachment to any specific person. B) to have an insecure attachment. C) to be a normal infant. D) to have emotion contagion