15. A child may expect playfulness only from dogs that look like hers. This refers to: a) extinction b) association c) generalization d) discrimination

The correct answer is d) discrimination. Discrimination refers to the ability to differentiate between different stimuli or objects. In this case, the child is able to discriminate and expect playfulness only from dogs that look like her, indicating that she is able to distinguish between dogs that look like her and those that do not.