The Things You Do: Internal Models of Others' Expected Behaviour Guide Action Observation

Area of Science:

• Cognitive Psychology
• Social Neuroscience
• Predictive Coding

Background:

• Humans navigate social interactions by predicting others' actions.
• Understanding how individuals' behavior patterns (person models) influence these predictions is crucial.

Purpose of the Study:

• To investigate the dissociable effects of explicit and implicit person models on action identification.
• To explore the formation and function of a person-specific social anticipation system.

Main Methods:

• Novel action identification task where participants judged actor interactions with objects.
• Manipulation of actors' action likelihoods across situations, unbeknownst to participants.
• In Experiment 2, explicit information about individuals was provided, either matching or mismatching their behavior.

Main Results:

• Implicit action likelihoods influenced response times, speeding up typical action identification.
• Explicit person knowledge affected error rates, leading participants to rely on expectations over observed behavior.
• Dissociable effects of implicit and explicit person information on action identification were observed.

Conclusions:

• Internal models of others' behavior are reactivated during action observation.
• Evidence for a person-specific social anticipation system that predicts actions using both explicit information and prior behavior.
• Findings link action observation to predictive coding models in non-social domains.