Integrated Contextual Representation for Objects’ Identities and Their Locations
Nurit Gronau, Maital Neta, and Moshe Bar
Journal of Cognitive Neuroscience
2008
• The influence of contextual processes on object recognition may stem from multiple sources of information. – Object identitiesEx: an office typically contains a desk, a desk
lamp, and a computer– LocationsEx: phones are typically placed above, and not
below desks
• Context frame: object identities + locations
• Not all empirical findings are necessarily in agreement with this concept.
• Contextual associations between visual objects can be independent of spatial location representations.– Context: lack of locations
• Ex: priming effect
– Context: lack of object identities• Ex: contextual cuing
• We propose that a unified context frame encompasses both these two subtypes of contextual associations.
• A global contextual representation can provide a highly coherent and meaningful representation of the visual environment.
Three critical cortex for context frame
• inferior prefrontal cortex (IPC): semantic and conceptual tasks
• medial-temporal lobe regions (hippocampus, parahippocampal cortex [PHC]): contextual associative processing
• lateral occipital complex (LOC): object-selective regions
EXP
Task: 2 AFC decision task
Behavioral results
General discussion
• Our results demonstrate that identity-based and location-based contextual factors interact with each other during visual object recognition.