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Related Experiment Video

Updated: May 8, 2026

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions

Published on: June 21, 2019

Dissociating between object affordances and spatial compatibility effects using early response components.

Meytal Wilf¹, Nicholas P Holmes, Isabella Schwartz

¹Neurobiology Department, Hebrew University of Jerusalem Jerusalem, Israel ; Department of Neurobiology, Weizmann Institute of Science Rehovot, Israel.

Frontiers in Psychology

|September 13, 2013

Summary

This summary is machine-generated.

Perception of objects involves action possibilities. This study differentiates spatial compatibility and affordance effects, finding they are independent and impact motor responses differently, suggesting general motor system activation by graspable objects.

Keywords:

EMG affordance amputees hand stimulus-response

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Area of Science:

Cognitive Psychology
Motor Control
Human-Computer Interaction

Background:

Objects can be perceived by visual features and action possibilities.
Previous research indicated graspable objects facilitate motor responses, but this was debated as spatial compatibility.
A need exists to differentiate affordance and spatial compatibility effects.

Purpose of the Study:

To dissociate affordance and spatial compatibility effects in object perception.
To investigate the temporal dynamics of these effects during motor responses.
To examine the role of available affordances in spatial compatibility.

Main Methods:

Participants performed a reaction-time task with graspable and non-graspable objects.
Responses were measured using electromyography (EMG) and finger key-presses.
A group of unilateral arm amputees was tested to assess effects in individuals with limited affordances.

Main Results:

Both spatial compatibility and affordance effects were significant and independent.
Spatial compatibility effects were present throughout movement preparation and execution.
Affordance effects were limited to the early stages of movement execution.

Conclusions:

Affordance and spatial compatibility effects are dissociable.
Graspable objects activate the motor system generally, not specific to the most suitable action.
Spatial compatibility effects do not necessarily depend on an individual's available affordances.