Researchers Studying Concept Learning Are Attempting to Train Subjects to Respond

Multiple Choice

Researchers studying concept learning are attempting to train subjects to respond to pictures of flowers by pressing one key, to pictures of dogs by pressing another key, and to pictures that lack of dogs or flowers by pressing a third key. Which result would suggest that a subject has learned the concepts?

A) In the test phase the subject responds correctly to new pictures of flowers and new pictures of dogs.
B) In the test phase the subject responds to yellow flowers but not red flowers, and only to dogs that resemble those presented during training.
C) In the test phase, the subject presses the third key in response to pictures with neither flowers nor dogs.
D) In the test phase, the subject presses the third key when the picture contains a flower and a dog.