Ch 6: Sensation and Perception Flashcards
Sensation
detect physical energy
Perception
give things meaning
Senses - (7)
- Vision
- Hearing
- Taste
- Touch
- Smell
- Vestibular
- Kinesthesis
Bottom Up Processing
begin with senses and move up to the brain
Doesn’t tell you what you’re sensing
Top Down Processing
Higher level thinking is used
use all “experiences” and “causes” that you know to figure something out
Absolute Threshold
the minimum stimulation needed to detect a stimulus 50% of the time
how much of a stimulation is needed to detect a stimulus
Signal Detection Theory
- goes against Absolute Threshold
- senses heighten when in extreeme cases or special circumstances
- brain senses better, senses do not get better
- e.g. war
Subliminal
below the Absolute Threshold
can’t sense it
Subliminal Messages
- messages that you can’t sense
- e.g. a picture flashes before your eyes that you can’t see
- no evidence it can make you do something big
Weber’s Law
the larger or stronger the stimulus, then you need an even stronger one to notice a difference
Sensory Adaptation
your senses will adapt to repeated new stimulations from being used to it
Visual Capture
the eye is the most dominant sense
capturing an image
Cornea
transparent shield that protects the eye
Iris
color of the eye
regulates the pupil
Pupil
opening in the eye
*Lens
Focuses incoming light to fovea - Accomodation
Fovea
the correct part where light should go in the eye
gives the best vision
focal point of the eye
Bipolar cells and Ganglean Cells
Sends info to the brain
Transduction
converts outside energy into a neural message
Nearsightedness
can’t see far away, but can see up close
Farsightedness
can’t see close up, but can see far away
Cataract
cloudy film covers lens
old age
Astigmatism
“slime” on cornea - bump on cornea
requires lasic surgery