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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



C. The Basilar Membrane

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


  • 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



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