Transcript Sensation & Perception

Sensation & Perception
Intro:
Blindfold Activity


Debrief- How important are each of the senses?
Rank them w/% of importance
Sight
 Touch
 Hearing
 Taste
 Smell



Discuss
Question: If a tree falls in the woods and no one is
around to hear it, does it make a sound?
Sensation & Perception
Fraser’s
spiral
1908
Sensation Definition

What occurs when a
stimulus activates a
receptor



Eg. The aroma of cookies
baking in the oven activates
your sense of smell
New Vocab: Threshold
Weber’s Law

The larger the stimulus, the
larger the change for an
observer to notice a
difference
Stroop
Effect
Perception Definition
Organizing sensory
info. into meaningful
experiences
 Brain tries to make
sense of large amount
of stimuli
 Creates “wholes” out of
bits of info. (Gestalt)

New Vocab: Perceptual
Set

Past experiences and perceptions create a
framework through which you view the world
 Ex “I perceive the smell of cookies baking as
comforting because my mom bakes them on
special occasions.”
 Ex “I perceive all old people as kind b/c my
grandma is kind.”
Simplicity (Reification)
 We
see the
simplest shape
possible
Proximity
When objects
are close
together, we
tend to
perceive them
as groups

When
Similarity
similar
and dissimilar
objects are
mingled, we
see similar
objects as
groups
Closure
 When we see a
familiar pattern or
shape w/missing
parts, we fill in
the gaps
Continuity
We
tend to see
continuous
patterns, not
disrupted ones
Figure and Ground
 Discrimination
between a figure and
its background
Invariance

Simple geometrical
objects are recognized
independent of rotation,
translation, and scale; as
well as several other
variations such as elastic
deformations, different
lighting, and different
component features.
Other Interesting
Perception Techniques
Count the number of “F’s”
FEATURE FILMS ARE THE RESULT OF YEARS OF SCIENTIFIC 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.
FEATURE FILMS ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH
THE EXPERIENCE OF YEARS
Rene Magritte’s “The
Human Condition”
Forcefully
demonstrates the
paradoxes of perception
through painting
Size Constancy
Simultaneous Contrast
“The donguri wave" illusion
Induced Motion:
Does the dot appear to
move?
Motion Parallax:
As we move, objects that are
closer to us move farther across
our field of view than do objects
that are in the distance.
Mueller-Lyer Illusion
Ouchi Apparent Motion
Illusion
QQQQQQQQQQ
QQQQQPQQQQ
QQQQQQQQQ
QQQOQQQQQ
QQQQQQQQQ
QQQQQQQQQQ
QQQQQPQQQ
QQQQQQQQQ
QQQOQQQQQ
QQQQQQQQQ
"Expanding Golden Cushion"
Expanding Snakes
Optical Illusion

http://www.youtube.com/watch?v=vzSRVgF5
01M&feature=related