The width of the confidence interval ______ as ? decreases.

According to the discussion of word production in Chapter10,

a. the most challenging aspect of language production is the motor movements required to produce the various phonemes. b. researchers agree that, during language production, we simultaneously retrieve information about three components of languageâ€"grammar, meaning, and sound. c. if you try to produce a particular noun, you will often retrieve it more effectively if you make a hand gesture. d. most college-educated North Americans have a speaking vocabulary of about 25,000 words.

Adolescents' self-concepts are becoming

A) divided into increasingly differentiated spheres. B) more concrete and less abstract. C) more physical and less psychological. D) more difficult for them to accept.