SENSATION AND PERCEPTION

Document Sample
SENSATION AND PERCEPTION Powered By Docstoc
					                                                      9/29/10




                SENSATION AND
                PERCEPTION
                Chapter 3 Ciccarelli and White




LET’S TALK ABOUT JOURNALS
  Make    sure you do the RIGHT entry
  Credit   this week, but next time half credit
  Turn journals in ON TIME (beginning of class)

  From now on late journals won’t be accepted

  Make sure it’s a full 1 ½ pages (to the line)

  Credit this week, but half credit next time

  Train of thought writing is fine, but make sure
   you consult your book if you’re not sure
  If it looks like you read the chapter and put in
   the effort, that’s what’s important




Sensation & Perception:
  Sensation:Special receptors in
  sense organs are activated,
  allowing various
forms of outside stimuli to
become neural signals in
the brain (wavelength of light
  the eye receives)

             The method by
  Perception:

which the brain takes all
experienced sensations and
allows them to be interpreted
in a meaningful way (color)




                                                           1
                                                  9/29/10




MONOCULAR DEPTH CUES
 Motion   parallax
   While moving, objects that are close to you
    appear to move very quickly; objects in the
    distance move much more slowly




MONOCULAR DEPTH CUES
   Accommodation
      The lens changes shape depending on the
       size of objects




MONOCULAR DEPTH CUES
  Linear Perspective
      Lines running parallel appear to
     merge in the distance




                                                       2
                                                                         9/29/10




MONOCULAR DEPTH CUES
 Relative      size (size constancy)
      Objects expected to be a certain size
          appear smaller when farther away




MONOCULAR DEPTH CUES

   Overlap
     If one object is blocking another, the blocked object is located
behind the other




MONOCULAR DEPTH CUES
 Atmospheric              Perspective
      The farther away something is, the hazier
         it will be




                                                                              3
                                                  9/29/10




MONOCULAR DEPTH CUES

 Texture        Gradient
   Textures blend together (become smaller
      and finer), the farther away an object is




BINOCULAR DEPTH CUES


  Convergence
      The closer an object is to
       the face, the more
       converged the eyes will be


  Binocular     Disparity
      The eyes produce two
       slightly different images
       in the brain, which are
       then compared to estimate
       depth




                                                       4
                                                                                      9/29/10




VISION PROCESS
1.     Light enters through the cornea
2.     Cornea pupil  lens retina
3.     Retina contains receptor cells (photoreceptors)
      1.    Rods respond to light and dark (periphery)
      2.    Cones respond to color (concentrated near fovea)
4.     Rods and cones connect to bipolar cells
5.     Bipolar cells transmit info to ganglion cells
6.     Ganglion cell axons comprise optic nerve
7.     Optic nerve connects to occipital lobe where
       sight is interpreted (blind spot where nerve
       connects)




                                ------------------RETINA-----------------




                                                                            LIGHT!!
Rods and Cones
(imbedded in retina)



Bipolar Cell Layer
                                                                            LIGHT!!



Gangloin cell Layer
(axons comprise
optic nerve)
                                                                            LIGHT!!




STRUCTURE OF THE EAR




                                                                                           5
                                                                      9/29/10




AUDITORY PROCESS
1.     Sound waves are gathered by the outer ear
2.     These waves cause the tympanic membrane to
       vibrate
3.     The TM causes the auditory ossicles to oscillate
4.     The ossicles conduct vibrations to the cochlea
5.     The cochlea transmits information to the
       temporal lobe via the vestibulocochlear nerve
6.     Note: Vestibular (balance/equilibrium)
       information is sent to brain via the
       vestibulocochlear nerve too!
7.     (vestibular sense = sense of balance, responsible
       for motion sickness)




What is the JND?
1.     Just Noticeable Difference = smallest difference
       between 2 stimuli that is detected half the time
2.     The difference is constant
      1.     Add 1 tsp of sugar to 5 tsp in a cup of coffee, and it
             tastes sweeter
      2.     How many tsp need to be added to 10 tsp?


  Focus on understanding eye and ear

  Make sure you also understand the
  processes behind olfaction (smell) and
  gustation (taste)




Homework and Announcements
  Exam            1
           October 1st (this Friday)
           Chapters 1, 2 and 3


  No       recitation next week (Oct 5th-7th)

  For       next time (Oct 12th-14th)
           Journal task #26
                Yellow book, page 35




                                                                           6

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:11
posted:9/27/2011
language:English
pages:6