Psych 225 Nov 29_Attention

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

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Unformatted text preview: Visual attention 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) Terminology • We can selectively attend to either locations or objects. I will use the term target to refer to both locations and objects. Exogenous vs endogenous • Exogenous : Properties that capture attention – Motion – Change – Visual distinctiveness – Personal/emotional significance • Endogenous – Goal-oriented, deliberate • Where’s Waldo? 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 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. Fig. 6-3, p. 135 • Henderson demo (VL) Fig. 6-CO, p. 132Fig....
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This note was uploaded on 01/09/2011 for the course PSYC 225 taught by Professor Staff during the Fall '10 term at UNC.

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

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