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PSY 101 AVC Dr. Gat
CH. 4 Sensation and Reality
42
Psychology
Undergraduate 1
11/06/2011

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Term



Sensation

Definition



Information arriving from sense organs (ears, eyes, etc)

Term
Perception
Definition
Mental process of organizing sensations into meaningful patterns-what occurs at the level of the brain
Term
Cornea
Definition
Transparent membrane covering the front of the eye; responsible for focus
Term
Lens
Definition
Structure in the eye that focuses light rays
Term
Retina
Definition
Light-sensitive layer of cells in the back of the eye
Term
Pupil
Definition
Opening at the front of the eye through which light passes
Term
Cones
Definition
Visual receptors for colors and bright light (daylight); 6.5 million in each eye
Term
Rods
Definition
Visual receptors for dim light, produce black & white; about 100 million total
Term
***ALL incoming visual information collects & transports to 1 impulse & travles from optic nerve to occipital lobe.
Definition
Term
At what level of the brain can you see picture?
Definition
Occipital lobe
Term
What sees the picture your eye or brain?
Definition
Brain
Term
Perceptual Defense
Definition
Resistance to perceiving threatening or disturbing stimuli (Like the experiment with "dirty words" and new mothers)
Term
Subliminal perception
Definition
Perception of a stimulus below the threshold for conscious recognition (story of coca cola executive)
Term
Trichromatic Theory
Definition
Color vision theory that states we have 3 cone types: red, green, blue
-other colors are produced by a mix of these
-black & white is produced by rods
(happens at the level of the eye)
Term
Opponent Process Theory
Definition
Color vision theory based on 3 "systems": red, green, blue OR yellow, black, white
-exciting one color in a pair (red) blocks the excitation in the other member of the pair (green)
The theory is that the trichromatic theory works at the level of the eye; at the level of the brain the opponent process works
Term
After image
Definition
Part of Opponent Process Theory; visual sensation that remains after stimulus is removed
Term
How long does it take humans to FULLY adapt to light?
Definition
30 minutes for eyes to adjust to dark
Term
Rhodopsin
Definition
Light-sensitive pigment in the rods; involved with night vision
Term
Pima
Definition
External part of the ear
Term
Tympanic membrane
Definition
Eardrum
Term
Auditory Ossicles
Definition
Three small bones that vibrate; link eardrum with the cochlea
Term
Oval window
Definition
Amplifies sound waves 90x!!
Term
Cochlea
Definition
Snail-shaped organ that makes up inner ear; (the "true" organ of HEARING)
Term
Hair cells
Definition
Receptor cells within cochlea that transduce vibrations into nerve impulses
-once dead they can never be replaced
Term
All _____ accumulate to __ nerve impulse that travels down the _______ to the _______ of the _____.
Definition
vibrations; 1; auditory canal; temporal lobe; brain
Term
Hearing occurs at what level?
Definition
Level of the BRAIN!
Term
Conduction Deafness
Definition
Poor transfer of sounds from tympanic membrane to inner ear
-compensate with amplifier (hearing aid)
Term
Nerve Deafness
Definition
Caused by damage to hair cells OR auditory nerve
-hearing aids useless in these cases since auditory messages cannot reach the brain
Term
Cochlear implant
Definition
Electronic device that stimulates auditory nerves
Term
Stimulation Deafness
Definition
Damage caused by exposing hair cells to excessively loud sounds
Term
By age 65, what percent of hair cells in the cochlea are lost?
Definition
40%
Term
Olfaction
Definition
sense of smell
Term
Pheromones
Definition
Colorless, odorless airborne chemical signal
Term
Uomeronasal organ
Definition
Sense organ for pheromones in animals
Term
Do humans have pheromones & can they be bottled in perfume or cologne?
Definition
Not 100% sure humans can produce pheromones; remains CONTROVERSIAL
Term
Where are pheromones believed to be found in humans?
Definition
Under arm sweat
Term
Selective attention
Definition
Voluntarily focusing on a specific sensory input
Term
Sensory adaption
Definition
When sensory receptors respond less to unchanging stimuli
Term
Which of our senses adapts the quickest?
Definition
Smell
Term
Which NEVER adapts and WHY?
Definition
Eyes never adapt because of *Physiological Nystagmus: eye is always moving in socket so it doesn't adapt
Term
Counter imitation
Definition
Using mild pain to block more intense or long-lasting pain
Term
Subliminal messages can only mildly influence attitude, the message has to be simple
Definition
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