More+Perception - Sensation and Perception Higher-level...

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Sensation and Perception Higher-level Perception Complexity of Perception: (Higher-level visual processing and object recognition) So much out there – how do we put it together? How do we break it down? How do we discern one object from another; determine and/or recognize the identity of the object? Beginnings of talks concerning memory – how our minds tend to "fill in the blanks" Sensory processing (3 types): Top-down Bottom-up Interactive (bidirectional) – this is where memory comes in Top-down : Look at the whole object first (start at "top") Then break complex stimuli into smaller parts, identify the parts in order to determine the logic of the whole Conceptually-driven; Deduction Context plays a huge role in determining how you will perceive ambiguous stimuli (i.e., expectations; memory) Bottom-up : Deals with unfamiliar stimulus in which we look at the PARTS first (start at bottom) and work our way up, summing the parts, and labeling the overall object based on the identity of the parts Pop-out (i.e., in visual search - Treisman). Data-driven; Induction We will talk more about this in the next lecture, so STAY TUNED! Feature Analytic Approach Examples that fall under either of the above categories – depends on whether or not there is prior familiarity with stimulus category Vision o Hubel's discovery of cells in striate cortex specialized for detecting lines of different orientations and movements o Pritchard's image fading in stabilized retinal cells o S's shown a complex stimulus ( ) that slowly faded from view o S's reported what they saw as stimuli faded H, B, 3, 4 Audition o Voicing feature detection Voice onset time (VOT) differs for /pa/ versus /ba/ (the latter occurs sooner)
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Sensation and Perception S's hear /ba/ which switches to /pa/ over and over and over…
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This note was uploaded on 04/24/2008 for the course PSYC 1101 taught by Professor Leader during the Spring '07 term at Georgia Tech.

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More+Perception - Sensation and Perception Higher-level...

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