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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

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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

  • Discriminability (sensitivity, or d’)

  • Bias (criterion, or b )


III. VISION BASICS – Let there be light!

Wavelength – color

Intensity – brightness

Purity – saturation


Capturing Light

  • The Eye is like a camera

    • Shutter

    • Lens

    • Film

    • Pupil - dilation

    • Lens - accommodation

    • Retina - transduction


Transduction – the retina

Rods and cones


Brain of Bust!


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 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)

  • 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

  • Binocular cues – retinal disparity and convergence


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

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

Dimensions of Sound

IntensityVolumedBFrequencyPitchHzPurityTimbre


  • Capturing Sound – the Ear


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


VI. The Chemical Senses – Smell and Taste

TEXTBOOK!!!!!


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