Stimulus equivalence and rule following.

Researchers built stimulus equivalence classes with musical symbols. Adults learned to match printed notes to piano keys through conditional-discrimination drills.

After the classes formed, the team asked for brand-new tasks. Participants had to play short tunes and describe the rules they followed. No extra teaching happened first.

People played correct novel melodies and talked about the rules with little help. The names the experimenter gave the stimuli barely changed the results.

The study showed that equivalence classes can create untrained, rule-governed music behavior.

Fields et al. (1991) extended this work. They showed that once classes form, people also generalize to new line lengths that look like trained members. The 1989 music study proved rule use; the 1991 study proved perceptual spread.

Emmelkamp et al. (1986) sounds like a contradiction: kids without language failed to form classes at all. The difference is age and verbal skill. Adults in the 1989 study had full language, so they could derive the musical rules.

Rapport et al. (1996) later added self-reports. Their college students could describe most emergent relations, backing up the idea that verbal processes guide equivalence-based rule following.

You can use compounded equivalence probes to test if learners truly understand a concept, not just memorize facts. After teaching note-letter relations, ask them to play or explain a new short tune. If they succeed, the class is solid and generative. If they struggle, check language prerequisites first, then re-teach with clearer conditional-discrimination trials.