PSYC132 Lecture Notes.pdf - 6/23 Lecture u25cf What do we...

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6/23 Lecture What do we use perception for? Interpret the world around us Support successful behavior Determine what is a threat, food, or Dave Connect with our environment, each other, and ourselves Hopefully, a truthful representation of reality How do we study perception? How do we perceive? What do we perceive? What IS perceived? Why do we perceive? Psychology, neuroscience , physics, philosophy, evolution, ecology How can we apply perception research Improve robotics and AI Speech recognition Face recognition Annotations Tactile keyboards An iPad that can read handwriting Medical aid Hearing aids “Smart” limbs Colorblind correction lenses Improved safety By knowing how we see, we can adapt environments Like roads and highways Musical highway neon/reflective strips Curves Marketing Age-appropriate shelving for products Development related perception marketing — big eyed dolls What is perception? Different historical researchers argue on this For our class, perception is the interpretation of sensory information How is this different from sensation? What role might memory or attention play? Sensation: what are our senses? Myth: we only have 5 senses Touch, taste, sight, hearing, smell Truth
Sight, touch, pain, taste, smell, hearing, appetite, pressure, sense of force/acceleration, balance, emotion, familiarity, faces, temperature, sense of dread/intuition/premonition/shadows, body regulation/physiological self-awareness, sense of self, sense of attraction, sense of time, consciousness, humor How do we sense? Woman looking at a red apple Apple reflects light, gives off chemicals (smell of its sweetness), vibrations of light energy Light travels into our face → stimuli signal transduced into neural code History of Perception Ancient Greeks Pythagoras Emanation hypothesis Eyes send out beams of light and bounce off of objects and come back to the eye Democritus Eidola hypothesis Light hits the object → light comes to eye Idea of simulation Aristotle Illusions Aristotle Illusion — touch discrimination Waterfall illusion — motion aftereffects Motion aftereffect Greek Architects Curved pillars seem straight from far away René Descartes Mind-body dualism The mind is a puppeteer The body influences the mind Doctrine of corporeal ideas We are aware only of body states Understanding of eyesight Lens focus Took an ox eye’s lens Distal — far away Visual angle narrower Proximal — closeby Visual angle wider Image inversion John Locke Tabula Rasa Nurture, not nature
Perception shaped by experience What supports this? Depth perception Haptic feedback We learn by experience Touch-learn-feel What counters this?

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