The ratio of a person's weight to height is that person's

In a study of adopted children (Tienary et al 1990) the finding that the only children who had a considerable likelihood of becoming schizophrenic were those who had a schizophrenic biological parent and who were also adopted into a troubled home is evidence of

a. the influence of nurture b. random variation in the population c. the influence of nature d. the interaction of nature and nurture

Which of the following is NOT true of the adolescent register?

A) It has an interesting vocabulary and includes many slang terms. B) It is used to identify adolescents as belonging to a particular social, cultural, or generational group. C) It has terms, syntax, and phonemes that rarely vary. D) It is found within social, regional, and ethnic groups.