Textbook Notes (359,268)
Canada (156,147)
Psychology (9,443)
PSYA01H3 (1,184)
Steve Joordens (1,046)
Chapter 6

Chapter 6- big notes

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School
University of Toronto Scarborough
Department
Psychology
Course
PSYA01H3
Professor
Steve Joordens
Semester
Fall

Description
PSYA01: Chapter 6 Notes from the Textbook Sensory Processing oSensation: the detection of the elementary properties of a stimulus (such as brightness, warmth, colour) oPerception: detection of the more complex properties of a stimulus, including its location and nature; involves learning ex. seeing the colour red is sensation, seeing a red apple is perception osense organs detect stimuli, information about these stimuli is transmitted to the brain through neural impulses (action potentials) , brain analyzes this information and reconstructs what has occurred oTransduction: conversion of physical stimuli into changes in the activity of receptor cells of sensory organs oeach sense organ responds to a particular form of energy given off by an environmental stimulus this means that transduction are as diverse as the type of stimuli we can perceive oReceptor Cells: a neuron that directly responds to a physical stimulus, such as light, vibrations, or aromatic molecules (smell and taste) *look at Table 6.1 Page 166 for types of transduction accomplished by sense organs osensory information must be coded accurately to represent the environment oa code is a system of symbols or signals representing information (like a language) oas long as we know the rules of the code, we can convert from one code to another without losing any information (like translating languages) osensory systems transmit information to the brain with two general forms: anatomical coding and temporal coding ofrom Chapter 1 (doctrine of specific nerve energies) we know that different sensory organs send their information to the brain through different nerves oAnatomical Coding: interprets the location and type of type of sensory stimulus according to which incoming nerve fibres are active oTemporal Coding: coding of information in terms of time (example rate) by firing at a faster or slower rate according to the intensity of a stimulus, an axon can communicate quantitative information to the brain ex. touch co the skin: firing of a particular set of neurons tells us where (anatomical code) the body is being touched, and rate at which neurons fire (temporal code) tells us how intense that touch is oPsychophysics: branch of psychology that studies the relation between physical characteristics of stimuli and the sensations they produce oWeber, an anatomist and physiologist, investigated ability of humans to discriminate between various stimuli oJust-Noticeable Difference (jnd): the smallest difference between two similar stimuli that can be distinguished, also called difference threshold 1 www.notesolution.com
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