Robert Plutchik proposed a model of emotions that suggested the existence of 8 primary emotions

Chase and Simon's research compared memory of chess masters and beginners for the position of game pieces on sample chess boards. They found that the chess master remembered positions better when the arrangement of the pieces was consistent with a real game but not when the pieces were randomly placed. The significance of this finding was that

a. experts show larger primacy and recency effects than beginners. b. knowledge in an area of expertise increases a person's digit span. c. expertise with some material reduces susceptibility to proactive interference with that material. d. chunking requires knowledge of familiar patterns or concepts

Which of the following statements about marriage is true?

a. In the current era, about one-third of the North American adults are married. b. The average age for a woman's first marriage in the United States and Canada is 21 years old. c. In the United States, European Americans are more likely to be married than Blacks. d. In the United States, ethnic-group membership is not related to the likelihood of being married.