PSY30400 Chapter Notes - Chapter 4: Visual Search
Chapter 4: Attention
• Feature Integration Theory:
o proposed by Treisman
o Proposes a two stage process as to why we perceive individual features as part
of a whole
▪ 1. Preattentive Stage:
▪ 2. Focused Attention:
• free floating features are bound together here
• Oserver’s attetio plays a iportat role i oiig the
features to create the perception of whole objects
• In order to demonstrate, repeated the illusory conjunction
experiment but told participants just to focus on the shapes
rather than the objects
o illusory conjunctions eliminated because all shapes and
colors were correctly matched
• Patient R.M.
o had Baliat’s Sydroe so he could not focus his
attention on individual objects so difficult for him to
correctly bind features together
o When presented with a red T and blue O, he continuously
reported seeing a blue T and red O in 23% of trials
o Mostly involves bottom-up processing because knowledge is not usually involved
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