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Dissertation Information for Gary L. Bradshaw

NAME:
- Gary L. Bradshaw

DEGREE:
- Ph.D.

DISCIPLINE:
- Psychology

SCHOOL:
- Carnegie Mellon University (USA) (1984)

ADVISORS:
- None

COMMITTEE MEMBERS:
- None

MPACT Status: Incomplete - Not_Inspected

Title: LEARNING TO UNDERSTAND SPEECH SOUNDS: A THEORY AND MODEL

Abstract: Theories of human speech perception have emphasized the role of innate feature detectors in speech comprehension. Empirical evidence suggests that theories based on specialized feature detectors are wrong, and that human listeners improve in their ability to identify the basic sounds of their language. A learning theory of speech perception is proposed to account for the evidence. To test the theory, a computer simulation, NEXUS, was created. When provided with a simple vocabulary of the names of the letters of the alphabet, NEXUS was able to create descriptions of all words, identify the similarities between words, and simplify the network by eliminating redundant information. The resulting word network was used to classify new instances of speech. Performance of NEXUS was superior to that of a state-of-the-art speech recognition system, Cicada, on both speakers tested. NEXUS serves as a sufficiency proof of the learning theory, although the lack of detailed learning data precludes stronger comparisons with human performance. NEXUS also demonstrates that learning heuristics can be very useful in building computer systems to perform perceptual tasks, such as speech recognition or vision. These heuristics do not require statistical assumptions about the form of the distribution underlying the data.

MPACT Scores for Gary L. Bradshaw

A = 0
C = 1
A+C = 1
T = 0
G = 0
W = 0
TD = 0
TA = 0
calculated 2008-01-31 06:17:45

Advisors and Advisees Graph

Directed Graph

Students under Gary L. Bradshaw

ADVISEES:
- None

COMMITTEESHIPS:
- Terry Lee von Thaden - University of Illinois, Urbana-Champaign (2004)