When Yayoi was only six years, old her older brother hid in her closet, then unexpectedly jumped out and grabbed her when she came into her dark bedroom. This terrified Yayoi, and even though she is now 25, she is still frightened in dark places. Based on principles of classical conditioning, being grabbed unexpectedly by her brother

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Quizplus · Accepted Answer

The unconditioned stimulus (US) is the event that naturally triggers a response, and being grabbed unexpectedly by her brother would have caused an unconditioned response (UR) of fear. Therefore, it acted as an unconditioned stimulus (US) and would have elicited an unconditioned response (UR) of fear. Over time, the fear of the dark became a conditioned response (CR) to the previously neutral stimulus (NS) of being in a dark space, as it was associated with the unconditioned stimulus (US) of being grabbed by her brother.

When Yayoi Was Only Six Years, Old Her Older Brother