When left feels right: asymmetry in the affordance effect

Area of Science:

• Cognitive Psychology
• Human-Computer Interaction
• Neuroscience

Background:

• The affordance effect describes faster responses when an object's visual affordance matches the response location.
• Debate exists whether this effect stems from abstract spatial coding or direct motor activation.

Purpose of the Study:

• To investigate if the affordance effect arises from specific motor activation, not solely abstract spatial coding.
• To differentiate the roles of grasping affordance versus spatial coding in object interaction.

Main Methods:

• Participants responded to symbols superimposed on a pan image, with manipulated affordances.
• Bi-manual crossed and uncrossed responses were used to assess hand and spatial interactions.
• A three-way interaction analyzed affordance side, response mode, and correspondence.

Main Results:

• A correspondence effect was observed with right-side affordances and uncrossed hands, but not crossed hands.
• The left-side affordance condition showed a correspondence effect regardless of hand crossing.
• Results indicate a differential contribution of grasping affordance and spatial codes based on context.

Conclusions:

• Both grasping affordance and abstract spatial codes contribute to the affordance effect.
• The interplay between affordance, spatial coding, and motor responses is context-dependent.
• Findings suggest a nuanced understanding of how visual affordances guide action.