day03 - Psychology 2050 Perception 2 Sept 10 Day 03

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Psychology 2050 Perception 2 Sept 10 Day 03 http://blackboard.cornell.edu http//susan.psych.cornell.edu
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    Two Psychophysical Phenomena Measurement:    4 scales Anisomorphism: Hayek and 4 cases 1. Broca-Sulzer effect 2. Detection thresholds teleology absolute vs. relative Just noticeable differences -  JND s 3 methods: limits, adjustment, constant stimuli States of the nervous system spontaneous neural activity
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Gustaf Fechner 1801-1887 Elements of Psychophysics 1860 beginnings of empirical psychophysics a way to measure (in dealing with) the mind-body problem
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How do we measure? in all of science, 4 ways            S.S. Stevens, 1951
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nominal :    classifies                    gender “this is different than that” “this is the same as that”   nested nominality = hierarchies,    taxonomies   kingdom, phylum, class, order, family, genus, species
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nominal:    classifies                    gender nested nominality = hierarchies, taxonomies ordinal class @ CU orders “this is more than that”
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nominal:    classifies                    gender nested nominality = hierarchies, taxonomies ordinal:  class @ CU orders interval :     classifies,     °C, °F shows “measured” differences “This difference is equal to that difference” “This difference is twice that difference”
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nominal:    classifies                    gender nested nominality = hierarchies, taxonomies ordinal:  class @ CU orders interval:     classifies,     °C, °F shows measured differences ratio classifies, orders,    K, m, s, kg   has a true zero.  “This value is twice as   much as that value”  
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psychophysics psycho-physics ordinate --> psycho- usually ordinal scale abscissa --> -physics usually ratio scale Region of  plotted  function ordinate abscissa
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anisomorphism an - not iso - same morph - structure ism - practice, theory φ ψ  
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F.A. Hayek 
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This note was uploaded on 01/27/2011 for the course PSYCH 2050 at Cornell University (Engineering School).

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day03 - Psychology 2050 Perception 2 Sept 10 Day 03

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