Multiple Choice
Willis and Schaie's longitudinal study on cognitive performance allowed for comparisons of __________.
A) participants to a larger mainstream group, who possessed similar characteristics
B) participants' current performance on cognitive tasks to their performance years earlier
C) participants to others in various parts of the world and geographical locations
D) participants' current performance to others who are at a different developmental stage
Correct Answer:

Verified
Correct Answer:
Verified
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