Cattell's major contribution has been to

According to the research on the own-ethnicity bias,

a. people are consistently more accurate in recognizing individuals from their own ethnic group than from another ethnic group. b. people may not show the own ethnicity bias if they have frequent contact with people from another ethnic group. c. people actually recognize individuals better if they are from a different ethnic group. d. there is currently little evidence for this kind of bias.

Consider this statement: We are our own worst critic. According to Freud, which of the following components of our personality may best fuel this notion?

a) superego b) preconscious c) ego ideal d) ego