Sensation & PerceptionSensation & Perception

Chapter 8Chapter 8

SensationSensation

The process of receiving The process of receiving information from the environment.information from the environment.

PerceptionPerception

Assembling and organizing Assembling and organizing sensory information to make it sensory information to make it meaningful.meaningful.

StimulusStimulus

A change in the environment. A change in the environment. It can be measured! It can be measured!

(size,duration,intensity)(size,duration,intensity)

PsychophysicsPsychophysics

Develop a quantified relationship Develop a quantified relationship between stimuli from the world, between stimuli from the world, and the sensory experiences and the sensory experiences produced by them.produced by them.

Absolute ThresholdAbsolute Threshold

The smallest amount of energy The smallest amount of energy that will produce a sensation.that will produce a sensation.

TasteTaste

1 teaspoon of sugar in two gallons 1 teaspoon of sugar in two gallons of water.of water.

SightSight

1 candle from 30 miles.1 candle from 30 miles.

TouchTouch

A bee wing dropped on an A bee wing dropped on an individuals cheek from a distance individuals cheek from a distance of 1/2 inch.of 1/2 inch.

HearingHearing

The tick of a watch from a distance The tick of a watch from a distance of 20 feet.of 20 feet.

SmellSmell

1 drop of perfume diffused into a 1 drop of perfume diffused into a three room apartment.three room apartment.

Subliminal MessagesSubliminal Messages

Below ThresholdBelow Threshold James Vicary, Sep. 12, 1957 New James Vicary, Sep. 12, 1957 New

Jersey theatre placed in film for Jersey theatre placed in film for 1/3000 of a second every 5 1/3000 of a second every 5 seconds and over 6 weeks.seconds and over 6 weeks.

EAT POPCORN DRINK COCA-COLA!EAT POPCORN DRINK COCA-COLA! Popcorn sales 18.1%Popcorn sales 18.1% Cola sales 57.7%Cola sales 57.7%

Webers LawWebers Law

The larger or stronger a stimulus, The larger or stronger a stimulus, the larger the change required for the larger the change required for an observer to notice.an observer to notice.

Sensory AdaptationSensory Adaptation

Our senses adjust themselves to a Our senses adjust themselves to a constant level of stimulation.constant level of stimulation.

Mr. Wizard Day!Mr. Wizard Day!

This will be This will be SENSATIONALSENSATIONAL

Stare at the star in the Stare at the star in the Lower Right corner.Lower Right corner.

Blind SpotBlind Spot

Spinning CardSpinning Card

Rods and ConesRods and ConesColor cards and peripheralColor cards and peripheral

Hook-up Video NowHook-up Video Now and Volunteer! and Volunteer!

Stroop TestStroop Test

Boys vs. GirlsBoys vs. Girls

KinesthesisKinesthesis

The sense of movement and body The sense of movement and body position.position.

Ex. Mirror glasses and Tantalizer Ex. Mirror glasses and Tantalizer game tracing stars.game tracing stars.

Vestibular SystemVestibular System

3 semicircular canals that provide 3 semicircular canals that provide a sense of balance.a sense of balance.

Located in the inner ear.Located in the inner ear.