Sensation and PerceptionHow does your mind trick you?

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How does selective attention effect you?

Focusing attention on one aspect of our experienceFocusing on good looks and ignoring personalityThe gorilla on the basketball court

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How does figure & ground effect you?Figure = Foreground - what we focus on

Ground = Background

What do you see?

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What do you see?

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How your mind organizes information for you by grouping

Proximity

Similarity

Continuity

Connectedness

Closure Seeing complete letters on

a sign even though some bulbs are burned out.

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Depth perceptionVisual cliff

Infants will stop at the “cliff”

The ability to perceive depth is at least partially innate.

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Do you remember?

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How does selective attention relate to the figure and ground effect?

What are the four ways your mind groups information to help make sense of it?

What is the visual cliff? What does it tell us about depth perception?

How does your brain organize your perceptions?

Gestalt psychologistsThe whole is more than the sum of its parts

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How does your brain create perceptual illusions?

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How does your brain use linear perspective?

Parallel lines converge

E.g. Railroad tracks

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Why do we see motion when none is there?

The perception of motion

Phi phenomenonApparent movement of stationary

lightsLas Vegas marquees

Stroboscopic movementCartoon book flip pagesMovies

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Which is larger?

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How do your eyes trick you with perceptual consistency?

Ponzo IllusionA bar further away appears larger even if the same size on

our retinas.

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Do both your eyes see the same thing? Retinal Disparity

Floating finger illusion

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Do you see what is actually there?

Muller-Lyer IllusionMisperception of length of lines

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Do you remember?What is the Gestalt perspective?What are some examples of linear perspective?What two things help you see movement when

none exists?What is the ponzo illusion?What is retinal disparity? Can you give a

demonstration of it?

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Do your beliefs effect what you see?Perceptual set

How do our beliefs affect our perception?

Definition of the situation

We often perceive what we expect to see

Our mental predisposition influences what we perceive

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How does the context effect what you see?

What you see is affected by the context in which you saw it.

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Human factor psychologists

How can we organize machines to fit our natural perceptions?

How could this natural map be made even better?

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Human factor psychologists: Designing flight instrument displays for pilots

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Extrasensory perception

Telepathy Mind-to-mind communication

Clairvoyance Perceiving remote events

Precognition Perceiving future events

Psychokinesis Mind over matter E.g. bending a spoon or raising a table

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Who has ESP?There is no reliable evidence that anyone possesses ESP.

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Do you remember?What is the Muller-Lyer illusion?What is perceptual set? How does it effect what

we perceive?What is the context effect? Can you give an

example?What is an example of something human factor

psychologists would study?Why might a police department not want to use a

person with ESP to solve a crime?

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