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sensation & Perception

Terms

undefined, object
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PSYCHOLOGICAL APPROACH
PHENOMICAL/ NATUALISTIC APPROACH
STUDEIS OBJECTS AND EVENT THAT OCCUR NATURALLUY
EXPERIMENTAL APPROACHE
ALLOWS STIMULUS PRESENTAION TO BE CONTOLLED OR REPLICATED


UNTAANGLES THE CONFOUNDING VARIABLES THAT OCCUR IN NATUAL SITUAIONS
BIOLOGICAL APPROCHES
THE LEGION TECHNIQUE

DESTROY PART  OF THE NEVOUS SUSTEM AND OBSERVING BEHAVIORAL CONSEQUENCES OF LEGIONS.
BRAIN IMAGING TECHNIQUES

MRI
PET
FMRI

SHOWS PHYSICAL STRUCTURE
SHOWS WHAT BRAIN IS DOING (INVASIVE PROCESS)
PUTS THE BEST OF BOTH TOGETHER: RECORDS NEURON ACTIVIY AND FINE GRAIN DETAIL
ABSOLUTE THRESHOLD
THE MINIMUM STIMULATION NEEDED TO DETCT A PARTICULAR STIMULUS 50% OF THE TIME
JND
DIFFERENCE THRESHOLD
JUST NOTICEABLE DIFFERENCE
MINIMUM DIFFERENCE BETWEEN 2 STIMULI THAT IS DETECTED 50% OF THE TIME

MEASURING THRESHOLDS
CONSTANT STIMULI

LIMITS

ADJUSTMENT
PRESENT STIMULI OF VARYING INTENSTY RANDOMLY
"  "STANDARD STIMULUS/COMPARE WITH BRACJKETING INTENSITY
PRESENT AS IN/DECEASE INTESITY
WEBER'S LAW
AMNT OF CHANGE TO PRODUCE JND X INITIAL INTENSITY / CONSTANT PORPROTONAL CHANGE
SENSORY LOBES

  FRONTAL
  TEMPORAL
  PARIATAL
  OCCIPITAL



MOTOR
HEARING
SKIN SENSES
VISION
ELECTRO MAGNETIC SPECTRUM

400-700 NANOMETERS
WAVE LENGTHS INTERACT WITH OBJECTS
POSTIONING OF EYES
FRONT LOCATION- DIFFERENT DIMENSIONS AND RELATIVE DEPTH 
TYPES OF VISION

PERIPHIAL

RETINA


MOVEMENT AND PRESENCE OF OBJECTS

HIGH DETIL BUT MUST HAVE ILLUMINATION
3 LAYERS OF EYE

1. F
2. VT
3. R
1. FIBROUS: SCLERA AND CORNEA (WHITE PART/BUBBLE)
2. VASCULAR TUNICE: CHOROID (BLOOD SUPPLY/PIGMENTAION)
3.RETINA: RETINA (TRANSDUCTION OF LIGHT ENERGY)
CORNEA

PUPIL
TRANSPARTEN, LOTS OF NERVE ENDINGS, LIGHT ENTERS AND IS BENT INWARD ONTO LENS

BLACK OPENING THAT REGULATES AMNT OF LIGHT (DEPTH OF FIELD)
IRIS



VITREOUS CHAMBER
OUTER LAYER IS PIGMENTED, INNER BLOOD VESSELS

ATTACHES TO LENS/ RETINA, NO PURPOSE AFTER TEENAGER YEARS
LENS


RETINA
BEHIND IRIS, CONVERGES DIVEGING LIGHT, CONSOLIDATGES LIGHT W/ CONVEX LENS


THIN LAYER OF CELLS THE CONVERT LIGHT TO NERVE IMPULSES

AGNOSA
INABLITILY TO RECOGNIZE OBJECTS
BOTTOM UP


TOP DOWN
PROCESS BASED ON INCOMING DATA


PROCESS BASED ON KNOWLEDGE





RODS

CONES


ACCOMIDATION
CANT RESOLVE FINE DETAIL, VISION W/LOW ILLUMINATION

COLOR RECEPTORS AND HIGH DETAIL (HIGH ILLUMINATION)
INCREASES FOCUSING POWER BY TIGHT/LOOSENING EYE MUSCHLE TO CAHNGE CURVE OF LENS TO BEND LIGHT WAVES

FOVEA
ONLY CONES

MACULAR DEGENERATION: OLD AGE DISEASE, DESTRUCTION OF CONES IN FOVEA
DOCTERIN OF SPECIFIC NERVE ENERGEY
OUR PRECEPTION DEPENDS ON NERVE ENREGIES REACHING HTE BRAIN AND WHICH NEVERS ARE STIMUATED
DARK ADAPTAION




PURKINJE
INCREASE IN SENSITITIY AS EYES REMAIN IN DARK
CONES MORE SENSITVE TO LIGHT= CONTROL VISION IN EARLY EXPOSURE

TRANSITION TO CONE VISION TO ROD VISION
RECEPTIVE FIELD SIZES
VARY W/ RETINAL LOCATION & DETERMINE WHICH STIMULI WILL OPTICALLY ACTIVATE EACH CELL

CENTER FIELD ARE SMALL
DISTANT FIELDS ARE LARGE BUT FAR FROM FOVEA
TYPES OF GANGLIAN

3 TYPES ( RETINAL CELLS)
ONLY  2 ARE IMPORTANT
MAGNOLCELLULAR: LISTN TO PERIPHAIL , LARGE CELLS AND RECEPTORS, RODS FOUND HERE (BLACK AND WHITE)

PARVOCELLULAR: SMALL FIELDS, CONES AND COLOR FOUND HERE

OPTIC NERVE
AXONS FROM EACH EYE COMBINE TO FORM THE OPTIC NERVE ( GANGLIAN CELLS

VISION FIELDS CORREPOND WITH OPPOSITE SIDES OF THE BRAIN
RT V.F.= LT. V.F.
RETINOTOPIC
MAP OF REITIANA I CONJUCTION WI CEREBRAL CORTEX
KITTEN EXPERIMENT
BRAIN DEVELOPES AS FAR AS VISUAL STIMULUS EX[POSURE
HUBEL & WIESEL
NOBEL PEACE PRIZE
simple cell-stationary line, at certan angle
comp

Deck Info

28

katherine

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