SENSATION AND PERCEPTION DEFINITIONS Sensation The stimulation of

  • Slides: 13
Download presentation
SENSATION AND PERCEPTION

SENSATION AND PERCEPTION

DEFINITIONS Sensation � The stimulation of sensory receptors and the transmission of sensory information

DEFINITIONS Sensation � The stimulation of sensory receptors and the transmission of sensory information to the brain Stimulus � Any aspect of change in the environment to which an organism responds. Perception � The organization of sensory information into meaningful experiences.

THRESHOLDS What is a threshold? Absolute Threshold � The weakest amount of a stimulus

THRESHOLDS What is a threshold? Absolute Threshold � The weakest amount of a stimulus required to produce a sensation 50 percent of the times presented. � Experiment

ABSOLUTE THRESHOLD EXAMPLES Vision � Seeing night. a candle flame from 30 miles away

ABSOLUTE THRESHOLD EXAMPLES Vision � Seeing night. a candle flame from 30 miles away on a clear Audition � Hearing Taste � Tasting water. a watch ticking from 20 feet away. one teaspoon of sugar dissolved in 2 gallons of Smell � Smelling one drop of perfume in a 3 -room house Touch � Feeling a bee’s wing falling a distance of 1 centimeter onto your cheek.

SUBLIMINAL STIMULI When a stimulus intensity is below your absolute threshold, it is subliminal.

SUBLIMINAL STIMULI When a stimulus intensity is below your absolute threshold, it is subliminal. Most commonly found as either visual stimuli or auditory stimuli. You are unaware of the stimuli, but your subconscious is and it can effect your behavior.

SUBLIMINAL MESSAGING Images � Subject would give more positive attributes to images of people

SUBLIMINAL MESSAGING Images � Subject would give more positive attributes to images of people after positive subliminal images rather than negative Face studies � Researchers will show subliminal images of happy or negative pictures. � Ask subjects to identify the emotion of a neutral face. Backtracking � Subliminal messages put into music, so when you play it backwards the message is recognizable.

DIFFERENCE THRESHOLD The minimum amount of difference a person can detect between two stimuli

DIFFERENCE THRESHOLD The minimum amount of difference a person can detect between two stimuli 50% of times tested. The Just Noticeable Difference (JND) is the smallest increase or decrease in the intensity of a stimulus that a person is able to detect. Weber’ Law � Different for every sense

SENSORY ADAPTATION When sensory receptors change their sensitivity to the stimulus. This phenomenon occurs

SENSORY ADAPTATION When sensory receptors change their sensitivity to the stimulus. This phenomenon occurs in all senses, with the possible exception of the sense of pain. Advantages? ?

SIGNAL DETECTION THEORY There is no true absolute threshold for a stimulus, the threshold

SIGNAL DETECTION THEORY There is no true absolute threshold for a stimulus, the threshold for a stimulus is different for every individual. Threshold is based upon: � Motivation � Experience � Expectations � Environment

WRAP UP Difference of Sensation and Perception Absolute and Difference Threshold Sensory Adaptation Signal

WRAP UP Difference of Sensation and Perception Absolute and Difference Threshold Sensory Adaptation Signal Detection Theory

Sensation and Perception Sensation and Perception Sensation stimulationSensation and Perception Sensation and Perception Sensation stimulation
Sensation Sensation and Perception ABCs Sensation ABCsofof SensationSensation Sensation and Perception ABCs Sensation ABCsofof Sensation
Sensation and Perception Sensation and Perception Sensation HowSensation and Perception Sensation and Perception Sensation How
Sensation and Perception Sensation and Perception Sensation HowSensation and Perception Sensation and Perception Sensation How
Sensation and Perception Sensation and Perception Sensation yourSensation and Perception Sensation and Perception Sensation your
Chapter 4 Sensation Perception Sensation and Perception SensationChapter 4 Sensation Perception Sensation and Perception Sensation
Sensation Perception Sensation and Perception Sensation The processSensation Perception Sensation and Perception Sensation The process
Sensation Perception Psychology 201 Sensation Perception Sensation isSensation Perception Psychology 201 Sensation Perception Sensation is
CHAPTER 4 SENSATION PERCEPTION SENSATION PERCEPTION v SensationCHAPTER 4 SENSATION PERCEPTION SENSATION PERCEPTION v Sensation
Chapter 8 Sensation Perception Sensation Perception Sensation WhatChapter 8 Sensation Perception Sensation Perception Sensation What
Chapter 8 Sensation Perception Sensation Perception Sensation WhatChapter 8 Sensation Perception Sensation Perception Sensation What
Ch 8 Sensation Perception Sensation Perception Sensation physicalCh 8 Sensation Perception Sensation Perception Sensation physical