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Psych 225 Nov 29_Attention

Psych 225 Nov 29_Attention - Visual attention Attention =...

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Visual attention
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Attention = selection Typically, at any moment there are many different locations or objects to which we could attend We cannot simultaneously attend fully to every location or object ( demo ) Attention involves selecting certain locations or objects for detailed inspection while ignoring others Selection can be exogenous (attention capture) or endogenous (directed attention)
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Terminology We can selectively attend to either locations or objects. I will use the term target to refer to both locations and objects.
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Exogenous vs endogenous Exogenous : Properties that capture attention Motion Change Visual distinctiveness Personal/emotional significance Endogenous Goal-oriented, deliberate Where’s Waldo?
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Mechanisms of visual attention Both overt and covert Eye movements are overt Gaze direction generally (but not always) indicates focus of attention Covert attending We can attend to targets without looking at them We can look at targets without attending to them Interest We select or notice those targets that are personally relevant or are congruent with our interests
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Studying eye movements Eye-trackers Video-record eye position and determine position of some reference point (e.g., a reflection of light from the eyeball) that moves as the eye moves.
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Fig. 6-3, p. 135
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Henderson demo (VL)
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Fig. 6-CO, p. 132
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What determines where we look in a scene?
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