Sensation and perception

sensation: your window to the world

perception:interpreting what comes in your window

• sensation
• the process by which our sensory receptor and nervous system receive stimulus from the environment.

• Bottom-up vs. Top-down processing
• bottom began with the sense receptor work up into 
• Top-down information processing got it by higher leave metal process.

• Absolute Threhold
• the minimum stimulation needed to detect a stimulus 50% on the time 

• Difference Threhold
• The minimum difference that a person can detect between two stimuli. Also noticeable difference

• Weber's law   
• The idea that to perceive a difference between two stimuli they must differ by a constant percentage not a constant amount. 

• Signal Detection Theory
• predict how we detect stimulus amid other stimuli.

•  Sensory Adaption
• Decreased responsiveness to stimuli due to constant stimulation.

• Selective attention
• The focusing of conscious awareness on a particular single

• Cocktail party effect 
• describes the ability to focus one's listening attention on a single talker among a mixture of conversation and background noises, ignoring other conversation form of selective attention.

perception