Sensation & perception
Revised July 21, 2013
Sensation & perception
Objectives At the end of this unit, you should be able. . . 1. to apply the notions of the JND, absolute threshold, and relative threshold; 2. to identify the most important parts of the visual system; 3. to recognize depth perception cues, Gestalt principles, and context effects. Questions from reading 1. Our olfactory sensors transduce _____ into _____. 2. What is the Just Noticeable Difference? 3. What is the difference between top–down and bottom–up processes? 4. Why does a tree seem to stay the same size as you walk toward it? 5. What is the binding problem? Lecture outline 1. Sensation A. Our sense organs as hypotheses (Holland, 1995) B. Sensitivity
Just noticeable difference (Thurstone, 1927) Absolute thresholds iii. Relative thresholds C. Signal detection theory (Tanner & Swets, 1954) i. Sensory adaptation 2. Visual system 1. The electromagnetic spectrum 2. Structures of the eye i. The retina ii. Rods iii. Cones C. Sensory adaptation i. Dark adaptation ii. Afterimages 4. Pathwaytothevisualcortex 5. Processing in the visual cortex 6. Pathways from the visual cortex 3. Perception A. Perceptual processes i. Bottomup i.
ii.
Introduction to Psychology Dr. Brian Malley
ii. Topdown B. Perceptual organization i. Cues (example: depth cues) 1. 1) Binocular disparity 2. 2) Texture gradient 3. 3) Linear perspective 4. 4) Occlusion cues ii. Principles 1) Proximity 2) Similarity 3) Continuity 4) Closure 5) Constancies
Size constancy iv. Shape constancy C. Context: Perceptual set i. Order effects ii. Context effects 4. Perceptual plasticity iii.
Sensation & perception
Objectives At the end of this unit, you should be able. . . 1. to apply the notions of the JND, absolute threshold, and relative threshold; 2. to identify the most important parts of the visual system; 3. to recognize depth perception cues, Gestalt principles, and context effects. Questions from reading 1. Our olfactory sensors transduce _____ into _____. 2. What is the Just Noticeable Difference? 3. What is the difference between top–down and bottom–up processes? 4. Why does a tree seem to stay the same size as you walk toward it? 5. What is the binding problem? Lecture outline 1. Sensation A. Our sense organs as hypotheses (Holland, 1995) B. Sensitivity
Just noticeable difference (Thurstone, 1927) Absolute thresholds iii. Relative thresholds C. Signal detection theory (Tanner & Swets, 1954) i. Sensory adaptation 2. Visual system 1. The electromagnetic spectrum 2. Structures of the eye i. The retina ii. Rods iii. Cones C. Sensory adaptation i. Dark adaptation ii. Afterimages 4. Pathwaytothevisualcortex 5. Processing in the visual cortex 6. Pathways from the visual cortex 3. Perception A. Perceptual processes i. Bottomup i.
ii.
Introduction to Psychology Dr. Brian Malley
ii. Topdown B. Perceptual organization i. Cues (example: depth cues) 1. 1) Binocular disparity 2. 2) Texture gradient 3. 3) Linear perspective 4. 4) Occlusion cues ii. Principles 1) Proximity 2) Similarity 3) Continuity 4) Closure 5) Constancies
Size constancy iv. Shape constancy C. Context: Perceptual set i. Order effects ii. Context effects 4. Perceptual plasticity iii.
