Multiple Choice
In the context of sleep and circadian rhythms, what is the primary role of melatonin as discussed in AP Psychology?
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Dr. Sardonicus is studying the effects of aging on memory. She gives an initial test of memory to a group of 20-year-olds and a group of 40-year-olds. Then she follows both groups of participants for a period of five years, regularly giving them memory tests during that time. Which research design is Dr. Sardonicus using?