A researcher took children into her lab and offered them as many high-sugar snacks as they wanted. She then recorded their activity level using various observational and physiological measures. She found that on all measures, high sugar intake was associated with high activity level. Which would be the best conclusion to reach from this data?
a. the sugar caused the high activity
b. there is a negative correlation between sugar consumption and activity level
c. there is a positive correlation between sugar consumption and activity level
d. children with higher metabolisms tend to eat more sugar and have higher activity levels
Ans: c. there is a positive correlation between sugar consumption and activity level
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Which type of drugs lead to the most dramatic changes in consciousness?
a. barbiturates b. depressants c. hallucinogens d. opiates
Research on brain injuries shows that
A) the young brain is completely plastic and, therefore, almost always recovers any abilities lost due to injury. B) children with early brain injuries show deficits in a wide variety of complex mental abilities during the school years. C) brain plasticity is restricted to infancy and early childhood due to the rapid production of neurons. D) the adult brain cannot produce new neurons and, therefore, lacks the plasticity of the young brain.