Sensation and Perception

Sensation and Perception

Sensation and Perception Sensation: your window to the world Perception: interpreting what comes in your window. Sensory Adaptation Decreased responsiveness to

stimuli due to constant stimulation. Do you feel your underwear all day? Cocktail-party phenomenon The cocktail party effect describes the

ability to focus one's listening attention on a single talker among a mixture of conversations and background noises, ignoring other conversations. Form of selective attention.

Absolute Threshold The minimum stimulation needed to detect a stimulus 50% of the time. (Just Notable Difference) Difference Threshold The smallest amount of change needed to detect in a stimulus before we

detect a change Subliminal Messages Do you hear "Now he uses marijuana.? Do you hear

Ah, see me. I'm not too young? Stimuli below our absolute threshold. Backmasking 25th frame Do Subliminal

Messages work? Probably a placebo effect Do you hear Pass the Do you backwards. Hear gunhear"Play

now. It kills the words sung.? love, the love is cold? A Letter from College Dear Mom,

$chool is really great. I am making lot$ of friend$ and $tudying very hard. With all my $tuff, I $imply can't think of anything I need, $o if you would like, you can just $end me a card, a$ I would love to hear from you. Love, $u$an

P.$. Thank$ for $ending the $weater.~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~ Dear Susan, I kNOw that astroNOmy, ecoNOmics, and oceaNOgraphy are eNOugh to keep even an hoNOr

student busy. Do NOt forget that the pursuit of kNOwledge is a NOble task, and you can never study eNOugh. Love, Mom P.S. Thanks for your NOte!!

Transduction Transforming signals into neural impulses. Information goes from the senses to the thalamus , then to the various areas in the brain.

Remember Ethan in Sky High. He changes his body to slime. Solid form to liquid form. Change from one form of energy to another. Click the picture to watch power placement. Vision

Our most dominating sense. Visual Capture Phase Two: Getting the light in the eye Phase Three: Transduction

Phase Four: In the Brain We have specific cells that see the lines, motion, curves and other features of this turkey. These cells are called feature detectors. Goes to the Visual

Cortex located in the Occipital Lobe of the Cerebral Cortex Feature Detectors Parallel Processing Color Vision

Two Major Theories Color-Deficient Vision People who suffer red-green blindness have trouble perceiving the

number within the design Trichromatic Theory Three types of cones: Red Blue Green These three types of

cones can make millions of combinations of colors. Does not explain afterimages or color blindness well. Opponent-Process theory The sensory

receptors come in pairs. Red/Green Yellow/Blue Black/White If one color is stimulated, the other is inhibited.

Afterimages Opponent Process- Afterimage Effect Hearing Our auditory sense/sound localization

The Ear Transduction in the ear Sound waves hit the eardrum then anvil then hammer then stirrup then oval window. Everything is just vibrating. Then the cochlea vibrates. The cochlea is lined with

mucus called basilar membrane. In basilar membrane there are hair cells. When hair cells vibrate they turn vibrations into neural impulses which are called organ of Corti. Sent then to thalamus up

auditory nerve. It is all about the vibrations!!! Deafness Conduction Deafness Something goes wrong with the sound

and the vibration on the way to the cochlea. You can replace the bones or get a hearing aid to help.

Nerve (sensorineural) Deafness The hair cells in the cochlea get damaged. Loud noises can cause this type of deafness. NO WAY to replace the hairs.

Cochlea implant is possible. Touch Receptors located in our skin. Gate Control Theory of Pain Taste

We have bumps on our tongue called papillae. Taste buds are located on the papillae (they are actually all over the mouth). Sweet, salty, sour

and bitter. Vestibular Sense Tells us where our body is oriented in space. Our sense of balance. Located in our

semicircular canals in our ears. Kinesthetic Sense Tells us where our body parts are. Receptors located in our muscles and joints.

With the kinesthetic sense you could touch the button to make copies of your buttocks.

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