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What do we use to direct our attention
Locations, where is the object we want?
Features, colours/contrasts/orientation
Objects, single and groups
What do we consider in object based attention
Features
Objects
What are the models of attention
Spotlight
Feature integration theory (FIT)
Integrated competition hypothesis
What is object based attention
The visual processes that select a segregated shape from amongst several segregated shapes
What is feature based attention
Enhances the representation of image characteristics throughout the visual field, useful when searching for a specific stimulus feature
Feature integration theory, Treisman 1980,1998)
Attention was conceptualised as the glue that binds visual features encoded by separate anatomical modules
Based on behavioural evidence of a qualitative distinction in performance in visual search tasks
Accounts for the difference between features and conjunction searches
Not all conjunction searches are slower than feature searches
What are biased competition models
Selection is the result of competitive interactions between objects
Stimuli presented within a receptive field generates strongest competition
Competition can be biased by bottom up and top down processes
Competition co-ordinates activity in distributed cortical regions
Note 
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