Extracting functional equivalence from reversing contingencies.

Area of Science:

• Cognitive Psychology
• Learning and Memory
• Behavioral Neuroscience

Background:

• Acquired equivalence is a learning phenomenon where distinct stimuli become related through shared outcomes.
• Previous models often rely on simple associative or attentional mechanisms to explain learning.
• Understanding the cognitive processes underlying acquired equivalence is crucial for explaining complex learning.

Purpose of the Study:

• To investigate the mechanisms of acquired equivalence in human participants.
• To test whether acquired equivalence is mediated by associative learning or by comparing cue-outcome structures.
• To examine the role of discovering equivalence relationships in transfer discrimination performance.

Main Methods:

• Two experiments involved presenting participants with four cues, with contingencies reversed across training blocks.
• Participants learned to associate specific cue pairs (A/B and C/D) with distinct outcomes within blocks.
• Performance was assessed using a transfer discrimination task, followed by interviews to gauge understanding.

Main Results:

• Transfer discrimination performance was significantly enhanced when generalizing stimuli sharing the same outcome within training blocks.
• No evidence of a bias towards specific cue-outcome contingencies was found.
• Enhanced performance in the transfer task was correlated with participants who identified the equivalence relationships during training.

Conclusions:

• The findings challenge simple associative and attentional explanations of acquired equivalence.
• Results support a model where acquired equivalence is mediated by comparing the similarity of adjacent cue-outcome structures.
• The ability to discover and utilize equivalence relationships is key to enhanced performance in transfer tasks.