Perception

Do you see what you think you see? Visual attention: Piecing things together – Movie Change blindness In what ways might selective attention be beneficial? In what ways might it be detrimental? What individual differences might lead some people to notice changes that others do not?

Do you see what you think you see? The gorilla on the court - Movie Selective attention What does this simple study tell us about the nature of human perception? What are some of the important everyday implications of our tendency to focus on only a very limited aspect of experience?

What do you see?

Figure & ground Figure = Foreground - what we focus on Ground = Background

Which line is the longest? Ponzo Illusion What else? Linear perspective

Which line is longest? Muller-Lyer illusion

How do lights move? Phi Phenomenon

Selective attention Give an example

What is visual capture? E.g. Motion sickness from movies

What is retinal disparity? E.g. sausage example

If we are looking at the Gestalt, what are we looking at?

Depth perception Will a baby crawl off the cliff? Infants will stop at the “cliff” What does this tell us? The ability to perceive depth is at least partially innate.

Stroboscopic movement Cartoon book flip pages

What is our perceptual set? Give an example in police work. Give another example.

Context effects Give an example

Human factor psychologists Organizing machines to fit our natural perceptions How could this natural map be made even better?

Human factor psychologists: Designing flight instrument displays for pilots

Give an example of: Telepathy Mind-to-mind communication Clairvoyance Perceiving remote events Precognition Perceiving future events Psychokinesis Mind over matter E.g. bending a spook or raising a table

There is no reliable evidence that anyone possesses ESP.

Grouping Proximity Similarity Continuity Connectedness Closure