Are object affordances fully automatic? A case of covert attention

Area of Science:

• Cognitive Neuroscience
• Perception Psychology
• Motor Control

Background:

• Current neurocognitive theories propose that viewing objects automatically elicits motor programs.
• The automaticity of these object-afforded motor plans, especially in non-foveal vision, remains unclear.

Purpose of the Study:

• To investigate the automaticity of motor plan generation for object affordances.
• To explore how attentional states modulate the perception of object-action priming.

Main Methods:

• Peripheral viewing of object pairs with varying action affordances (pinching, grasping).
• Central fixation with differential attention to one of two peripheral cue objects.
• Participants performed grip responses to background color changes, ignoring peripheral objects.

Main Results:

• Object affordances were perceived even in non-foveal vision, indicated by a significant interaction between response and object type.
• Motor preparation was biased toward the attended object when different object categories were presented.
• However, unattended stimuli also influenced affordance generation, showing partial automaticity.

Conclusions:

• Object-action priming is not entirely automatic but is constrained by perceptual selection processes.
• Attentional locus significantly modulates the generation of motor plans based on perceived object affordances.
• Peripheral vision plays a role in perceiving object affordances, even under divided attention.