A group of stimuli that share a common function, topography, or temporal relation and have a common effect on a response class (behavior).

Hint: Think of the stimulus class as the stuff that precedes and/or follows behavior. For example, your PTB ABA Study Manual, pens, highlighters, note cards and notebooks are the stimulus class of things that you use to study.

6th Edition TCO

B.2 Identify and distinguish between stimulus and stimulus class.