Sensation & Perception. Frasers spiral 1908 Sensation Definition What occurs when a stimulus activates a receptor What occurs when a stimulus activates.

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Presentation transcript:

Sensation & Perception

Frasers spiral 1908

Sensation Definition What occurs when a stimulus activates a receptor What occurs when a stimulus activates a receptor Eg. The aroma of cookies baking in the oven activates your sense of smell Eg. The aroma of cookies baking in the oven activates your sense of smell New Vocab: Threshold New Vocab: Threshold Webers Law Webers Law The larger the stimulus, the larger the change for an observer to notice a difference 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 Organizing sensory info. into meaningful experiences Brain tries to make sense of large amount of stimuli Brain tries to make sense of large amount of stimuli Creates wholes out of bits of info. (Gestalt) 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 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 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. Ex I perceive all old people as kind b/c my grandma is kind.

Perception Activity Depth Perception: Step 1: Have a friend (A) point a straw at you, parallel to the ground, with the straw about two feet away from you. You (B) will then practice quickly inserting a toothpick into the straw. Step 2: Cover one eye and repeat process Step 3: Cover other eye and repeat process Step 4: switch role with partner Discuss Monocular- one eye Binocular- two eyes Principles of Perceptual Organization

Simplicity (Reification) We see the simplest shape possible We see the simplest shape possible

Proximity When objects are close together, we tend to perceive them as groups 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 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 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 We tend to see continuous patterns, not disrupted ones

Figure and Ground Discrimination between a figure and its background 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. 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 Fs 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- FIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS Answer: 6 Most people see 3, but dont notice the fs on OF. It appears that we process those fs as vs.

Rene Magrittes The Human Condition Forcefully demonstrates the paradoxes of perception through painting Forcefully demonstrates the paradoxes of perception through painting

Size Constancy

Simultaneous Contrast

The donguri wave" illusion

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

Site Rankings By WhozOnTop.comWhozOnTop.com Rank Over All#8 Category - Colleges & Universiti es Colleges & Universiti es - Country - USAUSA- City - HanoverHanover- Visitor Approval Rating: 7.50 Visitors/day 4, VoteVote | Login | RegisterLoginRegister Motion Parallax: 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. 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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QQQQQQQQQQ QQQQQPQQQ QQQQQQQQQ QQQOQQQQQ QQQQQQQQQ Q

"Expanding Golden Cushion"

Expanding Snakes

Optical Illusion 01M&feature=related 01M&feature=related 01M&feature=related 01M&feature=related

Hypnosis Hypnotists guide the patient Hypnotists guide the patient Can create awareness of the unaware (eg. Past experiences) Can create awareness of the unaware (eg. Past experiences) Cooperative relationship Cooperative relationship Posthypnotic Suggestion Posthypnotic Suggestion A suggestion made during hypnosis that influences the participants behavior afterwards A suggestion made during hypnosis that influences the participants behavior afterwards Does it work? (start at 5:00 min) Does it work? (start at 5:00 min) Does it work? Does it work?

Meditation The focusing of attention to clear ones mind and produce relaxation The focusing of attention to clear ones mind and produce relaxation Transcendental Transcendental Mental repetition (mantra) Mental repetition (mantra) Mindfulness Mindfulness Focus on the present moment through the body Focus on the present moment through the body Breath Breath Concentration on respiration Concentration on respiration Does it work? Does it work?