PS102 Lecture Notes - Lecture 3: Visual Agnosia, Retina, Semicircular Canals
Document Summary
Perception: where you make sense of it. Transduction: conversion of stimuli into neural impulses * Absolute threshold is the smallest amount of a stimulus that one can detect 50% of the time. Smell: a drop of perfume diffused throughout a six room apartment. Taste: 5 milliliters of sugar in 9 liters of water. Touch: an insects wing falling on your cheek from a height about a centimeter. Hearing: the tick of a watch at 6 meters in a quiet room. Sight: a candle flame 50 km away on clear, dark night. Smallest difference in the amount of stimulus that a sense can detect. Weber"s law: size of jnd proportional to size of initial stimulus ***** Repeated stimulation of sensory cell leads to a reduced response. Bottom-up processing: perception that proceeds by transducing environmental stimuli into neural impulses that move successively into more complex brain regions combining little bits of information and put them together to make a big picture.
