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Perception. or Your distorted view of the world, and why nothing is as it seems. Perception. Renee Descartes “Cogito Ergo Sum”. Absolute Thresholds. Vision – Candle flame seen at 30 miles. Taste – Teaspoon of sugar in 2 gallons of water. Relative Thresholds.

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Presentation Transcript
slide1

Perception

or

Your distorted view of the world, and why nothing is as it seems.

slide2

Perception

Renee Descartes

“Cogito Ergo Sum”

slide3

Absolute Thresholds

Vision – Candle flame seen at 30 miles

Taste – Teaspoon of sugar in 2 gallons of water

slide4

Relative Thresholds

The extent to which a stimulus must increase in order for the change to be noticeable

I

I

Weber’s Law

= k

slide5

Adaptation

Adaptation – The ability to adjust to stimuli such as they are no longer uncomfortable or even noticeable

slide27

Audition

Shepard Tones

Little Rat Rotton Hut

Cough Studies

slide28

Attention

Watch Videos Now

slide31

Conclusions

  • The World as it exists is not what we perceive
  • To make up for deficiencies in our sensations, we engage in top down processing, which leads to predictable errors
  • Our attentional processes are limited to allow us to focus on what is important
  • Beware of upside down faces…
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