02-12 Lecture Slides (Final)

02-12 Lecture Slides (Final) - Lecture 7 Perception Pattern...

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2/12/13 1 Lecture’7:’ Perception’&’Pattern’ Recognition’3’ PSYC’2145:’ Introductory’Cognitive’Psychology’ February’12,’2013’ Announcements’ n 4 th ’ZAPS’assignment’( STROOP’EFFECT ),’due’ TOMORROW’ at’8:00’p.m.’ n Next’three’lectures’(02/14,’02/19,’&’02/21):’ Attention’ ¨ Readings:’ Reisberg’textbook’(Chapter’4)’&’Reading’3’(cell’ phone’use’&’driving,’02/19)’ n Grade-related’information’on’D2L’ ¨ Notify’your’TA’ if’you’notice’some’missing’entries’or’errors’for’ Unit’1’materials’(Q1-5,’ZAPS’1’&’2,’&’Mid-Term’1)’ by’the’end’of’ this’week’(Friday,’02/15) n Come’talk’to’me’if’your’1 st ’exam’score’was’not’as’good’as’ you’thought’ ¨ Bring’the’exam’booklet’&’the’feedback’sheet’to’the’meeting’ How’Do’We’Perceive/Recognize’Objects’and’Scenes? (covered on 02/07) n The’visual’system’uses’various’sources’of’ information’for’perception’&’recognition’ ¨ Information’directly’available’with’ stimulation’of’the’receptors’ n Simple’visual’features,’contours,’ orientations,’etc.’ ¨ Additional’information’based’on’our’prior’ experiences’and’knowledge’ n Consistent’perceptual’cues’or’principles’ acquired’through’experience’ ¨ Gestalt’principles’ ¨ Use’of’depth/distance’cues’ n Knowledge’and’expectations Bottom-up (data-driven) processing Top-down (conceptually driven) processing Driven’by’the’analysis’of’the’ input’given’ Driven’by’what’we’already’ know’from’our’prior’ experiences’and’contexts’ Both bottom-up and top-down processes are crucial
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2/12/13 2 Bottom-Up’ Theories’of’Pattern’Recognition’Focusing’ on’Feature’Analysis ’ (covered on 02/07) Pandemonium Model of Letter Recognition Recognition-by-Components (or Geon) Theory of Object Recognition Limitations’of’Purely’Bottom-Up’Processing (Covered on 02/07) n The’information’directly’available’to’the’receptors’(e.g.,’the’ 2D’image’on’the’retina)’is’often’ambiguous’ Additional’sources’of’information’(=’ top-down’processing)’is’necessary’to’ efficiently’resolve’such’ambiguities’ Some’Examples’of’Top-Down’Processing (covered on 02/07) n Prior’knowledge,’expectations,’and’context’can’influence’ the’way’you’perceive’the’stimulus’(=’top-down’e±ects)’
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2/12/13 3 Some’Lab-based’Top-Down’Efects’ n
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02-12 Lecture Slides (Final) - Lecture 7 Perception Pattern...

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