(Un)intentionality bias in action observation revisited.

Area of Science:

• Cognitive Psychology
• Social Neuroscience
• Perception Studies

Background:

• Humans commonly infer intentions from observed actions.
• Ambiguous actions are often perceived as internally driven, a phenomenon known as intentionality bias.
• Individual differences, particularly schizotypal cognitive style, can modulate this bias.

Purpose of the Study:

• To investigate how healthy individuals differentiate between intentional and unintentional actions.
• To examine the influence of schizotypal cognitive style on the perception of action intentionality.
• To explore the cognitive processes underlying intentionality attribution.

Main Methods:

• Participants observed actions of a finger attached to a pulling device.
• Strategies for inferring intentionality, such as action onset and finger posture, were reported.
• Individual schizotypal cognitive style was assessed.

Main Results:

• Action posture aligning with the goal (e.g., bent finger for button push) increased perceived intentionality.
• The tendency to perceive goal-aligned actions as intentional decreased with higher schizotypal scores.
• Intentionality attribution is not automatic but involves integrated cognitive processes.

Conclusions:

• Intentionality attribution is a complex process influenced by action features and individual differences.
• Schizotypal cognitive style modulates the perception of intentionality, suggesting a deviation from a simple intentionality bias.
• Attributing or denying intentions requires integrating high- and low-level cognitive functions.