1. discriminative

adjective. ['dɪˈskrɪmənətɪv'] capable of making fine distinctions.

Rhymes with Discriminative Stimulus

2. discriminative

adjective. ['dɪˈskrɪmənətɪv'] expressing careful judgment.

3. stimulus

noun. ['ˈstɪmjələs'] any stimulating information or event; acts to arouse action.