Final answer:
Sheryl's forgetfulness is an example of absentmindedness, a type of memory error resulting from divided attention or preoccupation.
Step-by-step explanation:
When Greg's wife, Sheryl, remembers only a few items from the grocery list and forgets the rest, she is exhibiting a common memory error known as absentmindedness. Absentmindedness is a lapse in memory caused by breaks in attention or being preoccupied with different thoughts. It's a phenomenon that everyone experiences, such as when someone walks into a room and forgets why they did, or cannot locate their misplaced cell phone. Cynthia, a psychologist, provides another example when she rushed out of the court due to her daughter's illness and later could not recall whether she had returned her temporary identification. In both instances, Sheryl and Cynthia were distracted or preoccupied, leading them to forget certain actions they had performed or items they needed to remember.