1. Jean Piaget refers to the developmental period between birth and age 2 as _______________. 
   a. the cognitive stages b. the sensorimotor stage c. the infancy period d. the dormant years  
2. Adults contemplate, analyze, infer or imagine, but babies just ___________.
   a. respond b. explore c. act d. imitate  
3. This has been defined as any behavior that is nonliteral, intrinsically motivated, self-chosen and pleasurable.
   a. play b. symbolizing c. construction d. development  
4. This is one of the most debilitating conditions for children.
   a. language delay b. poverty c. attachment d. divorce  
5. This is a type of thinking in which children are unable to understand that there are other viewpoints in the world besides their own.
   a. autonomy b. mistrust c. security d. egocentrism  

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