PSYC 2207 Speech Lecture one Orienting Question

1
PSYC 2207 (Speech) Lecture one - Orienting
Question

• In what ways have speech perception and speech
  production been modelled?

2
We both produce language and comprehend other
peoples speech The stimuli we perceive are
unique in this respect Leads to two specific
classes of models of speech production and
perception Autonomous theories of production and
perception Linked theories of production and
perception
3
(No Transcript)
4
Example of autonomous production

• Account of the way the articulators produce the
  different types of speech sound.
• Types of sounds - phonemes, roughly equates to
  consonants and vowels
• Articulation of vowel
• Articulation of stop consonant

5
Example of autonomous perception

• Account using the perceptual processes we learned
  about in the hearing component of the course.

6
Linked theories - two varieties

• Account of production that uses perception to
  explain the production process
• Account of perception that uses production to
  explain the perception process
• Two immediate problems
• Buck passing - difficulties encountered ascribed
  to some outside process
• Both cannot be correct otherwise the arguments
  are circular

7
General problem for all these theories is that
the articulation of one sound can result in many
different acoustic realizations(onemany
mapping) and the perception system then has to
map these many realizations onto single
perceptual events (manyone mapping)
8
Some of the factors that give rise to the same
articulation having many different realizations
in the sound structure

• Accent
• Speaker
• Speech rate
• Prosody
• Coarticulation (the /s/ in see and sue)
• Segmentation - what part of a sound goes with
  what speech event

Now want to look at an example of each type of
linked theory and will consider some practical
applications
9
Key references for lecture 1 - Howell, P.
(1996). Producing and perceiving speech. In D
Green et al., Cognitive Science, Blackwell
publishers, pp. 120-147. (Elementary) Howell, P.
Harvey, N. (1983). Perceptual equivalence and
motor equivalence in speech. In B. Butterworth
(Ed.), Language Production, Vol. 2, 203-224.
Academic Press. (Advanced)