Substituting objects from consciousness: a review of object substitution masking

Area of Science:

• Cognitive Neuroscience
• Visual Perception

Background:

• Object substitution masking (OSM) is a phenomenon where a sparse, trailing mask hinders the visibility of a brief target.
• Existing theories propose explanations involving feedforward and feedback neural processes, feedforward processing alone, or cognitive mechanisms like object updating.

Purpose of the Study:

• To review and synthesize current theories of object substitution masking (OSM).
• To examine how different theories account for key findings in OSM research.
• To explore the relationship between OSM and related visual-cognitive phenomena.

Main Methods:

• Literature review of theories explaining object substitution masking.
• Analysis of empirical findings related to OSM.
• Comparison of OSM with phenomena such as change blindness and metacontrast masking.

Main Results:

• OSM theories vary, encompassing neural interplay (feedforward/feedback), feedforward-only processing, and cognitive explanations (object updating).
• OSM's relationship with object correspondence, change blindness, metacontrast masking, backward masking, and visual short-term memory is examined.
• OSM appears to impair perception when visual events are confused due to low spatiotemporal resolution and occupied processing resources.

Conclusions:

• Object substitution masking arises under conditions of low spatiotemporal resolution and limited processing resources.
• The phenomenon highlights the brain's mechanisms for distinguishing separate visual events.
• Understanding OSM provides insights into the interplay of neural and cognitive processes in visual perception.