Multiple Choice
In the context of sleep and circadian rhythms, what is the primary role of melatonin as discussed in AP Psychology?
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?