Psyco 104 Basic Biological Processes Help Psych home
Sec. A7, R 12:30 - 1:50 E-mail

Sensory and Perceptual Processes: Lecture Notes - Week 2

    • Speech Perception and Spelling
  • Physiological Foundations for Seeing
  • Seeing Patterns and Recognizing Objects
  • Seeing in Three Dimensions and Seeing Constancies

Components of Sensation/Perception

External stimulus
Receptors
Sensory neurons
CNS
 

Components of Speech Perception

  • External stimulus
    • speech
  • Receptors
    • Hair cells of the organ of Corti on the basilar membrane
  • Sensory neurons
    • Auditory nerve projects to the brain stem
    • Interneurons project through the midbrain to the thalamus
    • Thalamic projections to the auditory cortex
  • CNS
    • Primary sensory area= auditory cortex
    • Speech comprehension involves Wernickeís area


Speech Perception

Speech stream ----> Comprehension

Speech stream has minimal temporal breaks:

Sensation = reception of the waveforms
Perception = making sense of the waveforms
 

Speech Perception involves

  • Discriminating phonemes
  • Assigning meaning to the phonemes
  • Comprehending the morphemes

Fuzzy Logic Model of Speech Perception

Sensory Input            Evaluation      Integration  Decision

  "scikologee"          "psychology"
 

Spelling

Accurate speech perception is essential for correct spelling

Confusable Words Spelling Test:
 
 
 
 
 
 
 

How Can Errors in Speech Perception Affect Spelling?

Sensory Input            Evaluation      Integration  Decision
 
 
 

Origins of Spelling Errors

  • Unclear sensory input
    • Garbled speech
    • Accent, dialect
  • Incorrect or incomplete segmentation
    • Over-sounding out
    • Under-sounding out
  • Errors in phoneme to grapheme translation
    • Confusable phonemes