Action Intention-based and Stimulus Regularity-based Predictions: Same or Different?

Area of Science:

• Neuroscience
• Cognitive Psychology
• Computational Neuroscience

Background:

• Humans constantly predict future events based on actions and sensory experiences.
• The interplay between action-based and sensory predictions remains incompletely understood.
• Understanding these prediction mechanisms is crucial for explaining adaptive behavior.

Purpose of the Study:

• To investigate the relationship between action-intention and sensory-regularity predictions.
• To compare event-related potential (ERP) responses to violations of intention, regularity, or both.
• To determine how the brain integrates these distinct prediction sources.

Main Methods:

• Implementation of a self-generation oddball paradigm with button presses and auditory stimuli.
• Manipulation of action-tone associations and button-press likelihood.
• Analysis of event-related potential (ERP) components (N1b, Tb, MMN, P3a).

Main Results:

• N1b and Tb components were sensitive only to tone regularity violations.
• MMN responses were elicited by violations of both action intention and regularity.
• P3a effects indicated that tone deviance was equally detected regardless of prediction basis.
• No additive prediction errors were observed when both intention and regularity were violated concurrently.

Conclusions:

• Action intention and sensory regularity predictions integrate in the brain, rather than acting additively.
• The brain flexibly switches between top-down intention-based and bottom-up regularity-based predictions.
• This study provides novel insights into the neural mechanisms of predictive processing during action.