In Piaget's theory, the most powerful __________ are __________ and __________
A) schemes; categorization; hierarchical classification
B) mental representations; images; concepts
C) operations; hypothetico-deductive reasoning; logical necessity
D) cognitive skills; private speech; propositional thought
B
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In which substage of sensorimotor development would you first witness goal-directed behavior?
a. Simple reflexes b. Secondary circular reactions c. Primary circular reactions d. Tertiary circular reactions
A(n) ________ examines longitudinal data and allows researchers to infer whether a characteristic at time 1 influences behavior at time 2
Fill in the blank with correct word.
DZ twinning occurs more often among
A) younger mothers. B) Asians. C) Caucasians. D) Africans.
In a national survey, approximately what percentage of both U.S. 15- to 19-year-old males and females said that they had engaged in oral sex?
A. 20 B. 50 C. 65 D. 35