Sex differences in play patterns and a preference for same-sex peers
a. is not clearly evident until the late elementary school years.
b. emerges only after children start attending elementary school.
c. is evident in toddlers (18 months to three years of age) and increases throughout the elementary school years.
d. is first evident in the play of preschoolers (about four to five years of age).
C
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When children learn grammatical morphemes for their parents' language, the earliest ones they master are those that
a. flow most smoothly through the LAD. b. are less complex in semantic or syntactic qualities. c. have been heard most often when listening. d. have been spoken most often when talking.
A key reason for heroin being so addictive is that it ______.
A. can be consumed in many ways B. easily and rapidly enters the brain C. produces euphoria followed by a phase of intense alertness D. has very aversive withdrawal symptoms
Punishment is supposed to be a "mirror image" of reinforcement, meaning that it
(a) is supposed to increase a certain behavior (b) is supposed to decrease a certain behavior (c) does not show generalization (d) is easy to understand
________ occur(s) when a previous treatment alters the observed behavior in subsequent treatments.
A. Carryover effects B. Experimenter bias C. Sensitization effects D. Error variance