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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

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

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

I

I

Weber’s Law

= k


Adaptation

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























Audition

Shepard Tones

Little Rat Rotton Hut

Cough Studies


Attention

Watch Videos Now




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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