Sensation & PerceptionSensation & Perception

Intro:Intro:Blindfold ActivityBlindfold Activity

Debrief- How important are each of the Debrief- How important are each of the senses?senses?

Rank them w/% of importanceRank them w/% of importance SightSight TouchTouch HearingHearing TasteTaste SmellSmell

DiscussDiscuss Question: If a tree falls in the woods and no Question: If a tree falls in the woods and no

one is around to hear it, does it make a one is around to hear it, does it make a sound? sound?

Sensation & PerceptionSensation & Perception

Fraser’s spiral 1908

Sensation Sensation DefinitionDefinition What occurs when a What occurs when a

stimulus activates a stimulus activates a receptorreceptor Eg. The aroma of Eg. The aroma of

cookies baking in the cookies baking in the oven activates your oven activates your sense of smellsense of smell

New Vocab: ThresholdNew Vocab: Threshold Weber’s LawWeber’s Law

The larger the stimulus, The larger the stimulus, the larger the change for the larger the change for an observer to notice a an observer to notice a differencedifference

StrooStroop p

EffectEffect

Perception Perception DefinitionDefinition

Organizing sensory Organizing sensory info. into meaningful info. into meaningful experiencesexperiences

Brain tries to make Brain tries to make sense of large sense of large amount of stimuliamount of stimuli

Creates “wholes” Creates “wholes” out of bits of info. out of bits of info. (Gestalt)(Gestalt)

New Vocab: New Vocab: Perceptual SetPerceptual Set

Past experiences and perceptions Past experiences and perceptions create a framework through which you create a framework through which you view the worldview the worldEx “I perceive the smell of cookies Ex “I perceive the smell of cookies

baking as comforting because my baking as comforting because my mom bakes them on special mom bakes them on special occasions.”occasions.”

Ex “I perceive all old people as kind Ex “I perceive all old people as kind b/c my grandma is kind.”b/c my grandma is kind.”

Simplicity Simplicity (Reification)(Reification)

We see the We see the simplest simplest shape shape possible possible

ProximityProximity When When objects are objects are close close together, we together, we tend to tend to perceive perceive them as them as groupsgroups

SimilaritySimilarityWhen When similar and similar and dissimilar dissimilar objects are objects are mingled, we mingled, we see similar see similar objects as objects as groupsgroups

ClosureClosure When we When we

see a familiar see a familiar pattern or pattern or shape shape w/missing w/missing parts, we fill parts, we fill in the gapsin the gaps

Continuity Continuity We tend to We tend to see see continuous continuous patterns, not patterns, not disrupted disrupted ones ones

Figure and Figure and GroundGround

Discrimination Discrimination between a between a figure and itsfigure and its background background

InvarianceInvariance

Simple geometrical Simple geometrical objects are objects are recognized recognized independent of independent of rotation, translation, rotation, translation, and scale; as well as and scale; as well as several other several other variations such as variations such as elastic deformations, elastic deformations, different lighting, different lighting, and different and different component features. component features.

Other Interesting Other Interesting Perception Perception TechniquesTechniques

Count the number of Count the number of “F’s”“F’s”

FEATURE FILMS ARE THE RE-FEATURE FILMS ARE THE RE-

SULT OF YEARS OF SCIENTI-SULT OF YEARS OF SCIENTI-

FIC STUDY COMBINED WITHFIC STUDY COMBINED WITH

THE EXPERIENCE OF YEARSTHE EXPERIENCE OF YEARS

FEATURE FILMS ARE THE RE-

SULT OF YEARS OF SCIENTI-

FIC STUDY COMBINED WITH

THE EXPERIENCE OF YEARS

Answer: 6

Most people see 3, but don’t notice the f’s on OF. It appears that we process those f’s as v’s.

Rene Magritte’s Rene Magritte’s “The Human “The Human Condition”Condition”

Forcefully Forcefully demonstrates the demonstrates the paradoxes of paradoxes of perception through perception through paintingpainting

Size ConstancySize Constancy

Simultaneous Simultaneous ContrastContrast

““The donguri wave" The donguri wave" illusionillusion

Induced Motion:

Does the dot Does the dot appear to move?appear to move?

 

Motion Parallax:Motion Parallax:

As we move, objects that As we move, objects that are closer to us move are closer to us move

farther across our field of farther across our field of view than do objects that view than do objects that

are in the distance. are in the distance. 

Mueller-Lyer Mueller-Lyer IllusionIllusion

Ouchi Apparent Ouchi Apparent Motion IllusionMotion Illusion

QQQQQQQQQQQQQQQQQQQQQQQQQPQQQQQQQQQPQQQQQQQQQQQQQQQQQQQQQQQQQOQQQQQQQQOQQQQQQQQQQQQQQQQQQQQQQQ

QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQPPQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQOOQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ

"Expanding Golden "Expanding Golden Cushion"Cushion"

Expanding SnakesExpanding Snakes

Optical IllusionOptical Illusion

http://www.youtube.com/watch?http://www.youtube.com/watch?v=vzSRVgF501M&feature=related v=vzSRVgF501M&feature=related