Folk psychology our subjective notions of how perception works are na ve PSYC100 0924 0 Configurational superiority effect More information to process in the second display but response time is fast Perception is mostly in unconscious processes so its complexity tends to be underestimated We usually have far more information than we need therefore perceptions is said to be overdetermined by the stimulus Example biological research by Gunnar Johansson 1973 missed first part but second part said observers viewing the film reported vivid impressions of walking human figures eventhough the images contained only a few isolated bright points Research also shows we can reliably judhe gender from the walk of these same displays Mather Murdoch 1994 In the normal environment the perceptual system receives more information than it needs It is overdetermined by stimulus Perception facts 3 1 2 it is limited e x frequency spectrum it is also selective Hence we study selective attention cocktail party phenomenon comprehend one channel of information it requires memory for recognition info extracted from the visual system is matched with info stored in memory it is not entirely veridical trustworthy example optical illusions 4 5 Perception takes time 6 perception involves the active organization of sensory information necker cube R C James photo of dlamation 7 perception focuses on change instead of steady state information sensory adaptation disappearance of stabilized retinal images McCollough Effect 8 perception corresponds more to the distal than to the proximal stimulus Problem form a mental model of the distal stimulus in the real world Perceptual constancies primary information source comes from the constancies these are invariants they provide us with information about the world Sensory processes do not always result in conscious experience sometimes the response is automatic Bottom up processing vs top down Bottom up is data driven outside in Top down I hypothesis drive expectancy driven We are usually not aware of top down processing
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