The extensive rehearsal necessary to encode nonsense syllables best illustrates:

Preschoolers are correct in their use of grammar ___________ of the time

a. 60% c. 80% b. 70% d. 90%

During what developmental period are individuals most likely to notice that it is more difficult to perceive images in sharp focus and to see in dim light?

a. late teens b. young adulthood c. middle adulthood d. late adulthood