Emergent stimulus relations depend on stimulus correlation and not on reinforcement contingencies

Area of Science:

• Cognitive Psychology
• Behavioral Science
• Learning and Memory

Background:

• Emergent stimulus relations are crucial for complex cognition.
• Understanding the mechanisms driving emergent relations is key.
• Previous research often emphasizes operant conditioning.

Purpose of the Study:

• To investigate if novel stimulus relations emerge from correlations.
• To examine if these emergent relations occur even when conflicting with reinforced relations.
• To test the role of stimulus correlation versus operant contingencies in emergent relations.

Main Methods:

• A symbolic matching-to-sample task using kanji stimuli.
• Training involved reinforced choices (Bx) and non-reinforced choices (Gx, Hx) for specific sample stimuli (Ax or Cx).
• Tests for symmetry and transitivity were conducted, followed by tests for emergent relations with previously unreinforced stimuli.

Main Results:

• Three 3-member stimulus classes (AxBxCx) emerged in all participants.
• Further emergent relations between trained and untrained stimuli appeared in 4 out of 5 participants after overtraining.
• These emergent relations were controlled by stimulus correlations, overriding explicitly extinguished relations.

Conclusions:

• Emergent stimulus relations can arise from stimulus correlations, independent of reinforced operant contingencies.
• This finding supports theoretical models emphasizing stimulus correlation in explaining emergent relations.
• The results highlight the role of associative learning beyond direct reinforcement in human cognition.