The Impact of Action Intention Versus Action-Effect Intention on Auditory Prediction Error Signals.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Auditory Perception

Background:

• The human brain predicts sensory consequences of actions, generating prediction errors (PE) when outcomes deviate from expectations.
• Auditory event-related potentials (ERPs) are used to study neural markers of prediction error.
• Understanding how intention (action vs. action effect) influences PE processing is crucial.

Purpose of the Study:

• To investigate auditory ERP markers of prediction error (PE) based on action intention versus action-effect intention.
• To determine if focusing on the action or its sensory consequence modulates early PE processing.
• To explore the neural basis of action-effect binding and prediction violation.

Main Methods:

• Participants were divided into two groups: action intention (visual cues indicated button press) and action-effect intention (visual cues indicated tone pitch).
• Participants pressed buttons to produce tones, with occasional "incongruent sounds" where the expected tone did not occur.
• Auditory event-related potentials (ERPs), specifically N1, N2b, and P3 components, were recorded.

Main Results:

• Incongruent sounds elicited an enhanced auditory N1 component compared to congruent sounds only in the action-effect intention group.
• Later prediction error responses (N2b and P3 components) were observed in both groups, regardless of intention.
• This suggests early sensory prediction relies on effect-based intention, while later conceptual processing occurs in both.

Conclusions:

• Focusing on the intended action effect, rather than the action itself, leads to early sensory prediction and enhanced N1 response to prediction errors.
• Action-effect associations are represented and processed at a conceptual level, as evidenced by later ERP components in both groups.
• These findings support integrated models of event representation, incorporating stimuli, actions, and outcomes.