Summary: Sensation And Perception
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1 Sensation and Perception
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Stimulus from the environment which the nervous system transmits to the brain
Sensation -
Taking in the big picture first, details second
Top-Down Processing -
The process of sensation can be seen as three steps
Reception
Transduction
Transmission -
Stimulation of sensory receptor cells by energy
Reception -
Transforming cell stimulation into neural impulses
Transduction -
Delivering neural information to the brain for processing
Transmission -
Minimum stimulation needed to detect particular stimulus 50% of the time
Absolute Threshold -
Minimum differences between stimuli required to detect 50% of time
Difference Threshold -
Constant percentage that two stimuli must differ to be perceived
Weber's Law -
Diminished sensitivity as a consequence of constant stimulation
Sensory adaption (tunes out constant stimulation)
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