Sensation & Perception

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Presentation transcript:

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 Name the color of the words, why is this a challenge?

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

Similarity When 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 RE- SULT OF YEARS OF SCIENTI- FIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS

FEATURE FILMS ARE THE RE- SULT OF YEARS OF SCIENTI- 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 RE- SULT OF YEARS OF SCIENTI- FIC 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

Does the dot appear to move? Induced Motion: Does the dot appear to move?

Site Rankings By WhozOnTop.com Over All #8 Category - Colleges & Universities - Country - USA City - Hanover Visitor Approval Rating: 7.50 Visitors/day 4,755.59 Vote | Login | Register 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

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"Expanding Golden Cushion"

Expanding Snakes

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