Which of the following is true regarding the intellectual differences between and within various groups?
a. If differences within groups are at least partly genetic in origin, then differences between groups are also genetic.
b. The genetic differences between groups are 100 percent even though the within-group difference is entirely due to the environment.
c. Even if variation within each group is mostly due to genetic differences, the differences between groups may still be due to environmental differences.
d. Heritability estimates are valid in regard to group differences but not in regard to the variance found within a group.
Answer: c
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Little Gilbert likes to watch his brother play the Nintendo. Gilbert is displaying
a. functional play. c. onlooker play. b. lonely play. d. associative play.
Social interactionsts emphasize that
A) a single system of grammar underlies all languages. B) a language acquisition device helps children rapidly learn new words. C) brain regions housing language also govern similar perceptual and cognitive abilities. D) children's social skills and language experiences are centrally involved in language development.