According to the ________ perspective, human social behaviors (like smiling) were maintained in the population because they enhanced the survival and reproduction of our ancestors

According to the introduction to the chapter on problem solving,

a. the most useful problem-solving strategy is called the trial-and-error method. b. people are likely to take a more passive approach when solving problems than when working on most other cognitive tasks. c. people typically solve a problem by visualizing the goal state and ignoring the initial state. d. people typically use problem-solving strategies that can produce a solution fairly quickly.

What attachment type was highly predictive of later problems and included toddlers who in early and middle childhood exhibited hostility and aggression?

a. secure attachment b. insecure–avoidant attachment c. insecure–resistant attachment d. disorganized–disoriented attachment