Jimmy's mother places a new rattle in his crib. Instantly, Jimmy picks up the rattle, tries to mouth the rattle, and notices that when it shakes, it makes noise. Jimmy immediately tries shaking the rattle different ways to see how the sound changes, and he seems to enjoy this activity. What would Jean Piaget say this is an example of?
A. Substage 2: First habits and primary circular reactions
B. Substage 1: Simple reflexes
C. Substage 3: Secondary circular reactions
D. Substage 4: Coordination of secondary circular reactions
Answer: C
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Gracie underwent a growth spurt over the summer and felt awkward for a while on the soccer field in the fall. But after a couple of weeks of practice, she noticed she was able to move more quickly into position near the ball and thus have more options about re-directing it. According to dynamic systems theory, these changes are an example of __________.
A. maturation B. the self-organizing principle C. stability in the interrelationships among components of a system D. genetic predispositions
Shaylin was only 13, but she wanted to be a fashion model. Her parents were dead-set against it. Shaylin’s mother, a doctor, said that most fashion models have an unhealthy BMI
Indicate whether this statement is true or false.
Which of the following methods will create groups that are the most equivalent at the start of an experiment?
a. random assignment b. matching c. within-subjects design d. counterbalancing
Each of the following is true except ________
a. overweight children are more likely to grow up to be overweight adults b. overweight adults have increased risk of developing diseases like diabetes c. obesity is increasing despite decreases in portion size in recent years d. a sedentary lifestyle contributes to obesity