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PSYC 111: Intro Psych. Sensation and Perception. I. What’s the difference? - sensation - transduction - perception - binding. II. Psychophysics. The Absolute Threshold The Difference Threshold – JND and the Weber Fraction. III. The Theory of Signal Detection.

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Psyc 111 intro psych

PSYC 111: Intro Psych

Sensation and Perception


I what s the difference sensation transduction perception binding
I. What’s the difference? - sensation - transduction - perception - binding


Ii psychophysics
II. Psychophysics

  • The Absolute Threshold

  • The Difference Threshold – JND and the Weber Fraction


Iii the theory of signal detection
III. The Theory of Signal Detection

  • Discriminability (sensitivity, or d’)

  • Bias (criterion, or b )


Iii vision basics let there be light
III. VISION BASICS – Let there be light!

Wavelength – color

Intensity – brightness

Purity – saturation


Capturing light
Capturing Light

  • The Eye is like a camera

    • Shutter

    • Lens

    • Film

    • Pupil - dilation

    • Lens - accommodation

    • Retina - transduction




Iv in living color
IV. In Living Color

  • Trichromatic theory

    • Common patterns of color blindness

  • Opponent Process Theory

    • Negative afterimages - http://www.eyetricks.com/3001.htm

  • Which one is correct? It all depends…..


Iv in living color1
IV. In Living Color

  • Trichromatic theory

    • Common patterns of color blindness

  • Opponent Process Theory

    • Negative afterimages - http://www.eyetricks.com/3001.htm

  • Which one is correct? It all depends…..


V seeing forms objects
V. Seeing Forms (Objects)

  • Hubel and Wiesel – feature detectors in the PVC (Striate cortex)

  • Putting the features together

    • Gestalt Rules of Organization

      • Similarity

      • Proximity

      • Closure

      • Good continuation

      • Symmetry and Parallelism

  • The Case of the Face

    • Is face processing special?

      • Grandmother cells

      • Prosopagnosia

      • The Inversion Effect


Vi depth perception
VI. Depth Perception

  • Binocular cues – retinal disparity and convergence


Vi depth perception1
VI. Depth Perception

  • Binocular cues – retinal disparity and convergence

  • Monocular cues – the Bob Ross Cues

    • Height in field of view

    • Relative size

    • Texture gradient

    • Interposition

    • Linear perspective

    • Light and shadow

    • Motion parallax


Iv hearing
IV. Hearing

A. NOW HEAR THIS!!!! The Stimulus for Hearing

Dimensions of Sound

Intensity Volume dB Frequency Pitch Hz Purity Timbre



Psyc 111 intro psych

C. The Basilar Membrane

http://www.youtube.com/watch?v=dyenMluFaUw


Psyc 111 intro psych

  • Theories or Pitch Perception

    Place theory

    Frequency Theory

    Which one is right?

  • Sound Localization

    Binaural Cues

    Monaural Cues – doppler effect

  • Brain or Bust!

    auditory nerve

    medial geniculate nucleus

    primary auditory cortex