is the stimulus which is introduced or highlighted by the experimenter, however, the stimulus presented is not always the functional stimulus, it may just be a distraction.

NOMINAL STIMULUS: "Nominal stimuli always evoke a response in the receptive organism but they aren't always the functional stimulus."
Cite this page: N., Pam M.S., "NOMINAL STIMULUS," in, April 7, 2013, (accessed October 18, 2021).