Mary's physician is trying to test her visual perception. She shows six-month old Mary a picture of a boat until Mary no longer pays any attention to it

Then she shows Mary a picture of a house and immediately Mary begins to stare at the picture in entranced curiosity. Mary's physician was using the _______________ to test her visual perception.
a. habituation technique
b. longitudinal technique
c. attention-span technique
d. novelty technique

a