Transcript Sensation and Perception PowerPoint

Sensation & Perception
Chapter 8
Sensation

The process of receiving information
from the environment.
Perception

Assembling and organizing sensory
information to make it meaningful.
Stimulus
A change in the environment.
 It can be measured!
(size,duration,intensity)

Psychophysics

Develop a quantified relationship
between stimuli from the world, and the
sensory experiences produced by them.
Absolute Threshold

The smallest amount of energy that will
produce a sensation.
Taste

1 teaspoon of sugar in two gallons of
water.
Sight

1 candle from 30 miles.
Touch

A bee wing dropped on an individuals
cheek from a distance of 1/2 inch.
Hearing

The tick of a watch from a distance of
20 feet.
Smell

1 drop of perfume diffused into a three
room apartment.
Subliminal Messages
Below Threshold
 James Vicary, Sep. 12, 1957 New
Jersey theatre placed in film for 1/3000
of a second every 5 seconds and over 6
weeks.
 EAT POPCORN DRINK COCA-COLA!
 Popcorn sales 18.1%
 Cola sales
57.7%

Webers Law

The larger or stronger a stimulus, the
larger the change required for an
observer to notice.
Sensory Adaptation

Our senses adjust themselves to a
constant level of stimulation.
Mr. Wizard Day!
This will be
SENSATIONAL
Stare at the star in the
Lower Right corner.
Blind Spot
Spinning Card
Rods and Cones
Color cards and peripheral
Hook-up Video Now
and Volunteer!
Stroop Test
Boys vs. Girls
Kinesthesis
The sense of movement and body
position.
 Ex. Mirror glasses and Tantalizer game
tracing stars.

Vestibular System
3 semicircular canals that provide a
sense of balance.
 Located in the inner ear.
