Concepts

Stimulus generalization

Learning about one cue can influence responses to other cues that resemble it.

Definition

Stimulus generalization occurs when a response learned in relation to one stimulus also appears in the presence of other stimuli.

How to understand it

Generalization allows learning to extend beyond one exact encounter. To study it, vary features of a cue and measure responding rather than assuming that physically similar objects are psychologically equivalent. Which features matter depends on the learner’s experience and the demands of the situation.

Discrimination is the complementary pattern: responding differently to cues that signal different outcomes. Neither broad generalization nor narrow discrimination is always preferable. The useful question is whether the response tracks relevant distinctions. A learner can generalize across color while discriminating between shapes within the same task.

Evidence: (Spielman et al., 2020); (Conditioning and Learning, n.d.)

Testing a family of signals

Teaching scenario

In a fictional computer activity, a round green symbol signals that a brief practice exercise is available. After participants learn the signal, the activity introduces lighter green circles, blue circles and green triangles without assigning them outcomes. Measuring initial responses could reveal which features support transfer. If responses extend to green triangles but seldom to blue circles, color may matter more than shape in that setup. This is an illustration, not a claim about a universal generalization pattern.

Constructed for learning. This scenario is not a report of an empirical finding or a diagnosis.

Common confusion: General intelligence

Stimulus generalization is transfer of a response across cues, not a measure of broad reasoning ability or overall intelligence.

Evidence: (Spielman et al., 2020); (Conditioning and Learning, n.d.)

Limits of the concept

  • Similarity from an observer’s perspective may not match similarity for the learner.
  • Transfer in one task does not establish broad learning transfer to unrelated skills.

Evidence: (Spielman et al., 2020); (Conditioning and Learning, n.d.)

Textbook connection

Direct coveragePsychology 2e: 6.2 Classical Conditioning

This section directly introduces or explains the concept.

Supplementary concepts may extend beyond this section. The source notes below identify the evidence for those details.

Related concepts

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Sources and inspection notes

Checked October 21, 2026. An inspection date is not a source publication date. Definitions and scenarios on this page are original teaching explanations.

  1. Conditioning and learning. (n.d.). https://nobaproject.com/modules/conditioning-and-learningSupplementary conceptual evidence

    Academic module by Mark E. Bouton; accessed module text. Supports associative learning, consequences, extinction and stimulus control. Source checked 21 October 2026.

  2. Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020). Psychology 2e. OpenStax. https://openstax.org/books/psychology-2e/pages/6-2-classical-conditioningIntroductory textbook explanation

    This section directly introduces or explains the concept. Section opened and title verified on 21 October 2026.