Which term describes a group of stimuli that share specified common elements along formal, temporal and functional dimensions?

• A. Stimulus
• B. Stimulus Class
• C. Social Validity
• D. Setting/Situation Generalization

Answer: (B)

Stimulus class describes a group of stimuli that share common elements along multiple dimensions: formal (physical properties like shape, size, color), temporal (time-related relations or sequence), and functional (the same effect on behavior or the same type of reinforcement they signal). This makes it the best term because it captures both perceptual similarity and functional equivalence, allowing different-looking stimuli to be grouped if they serve the same purpose or evoke the same response. For example, red lights, hand signals, and stop signs can all function to signal stopping, even though their appearances differ, so they belong to the same stimulus class. In contrast, a single stimulus is just one cue; setting/situation generalization is about transmitting behavior across settings, and social validity concerns whether procedures meet social expectations.