COGS 200 Lecture Notes - Lecture 4: Contiguity, Phoneme, Speech Perception
Document Summary
Speech perception: the perceptual mapping from acoustic signal to a linguistic representation, ie phoneme (a perceptually distinct unit of sound that distinguishes one word from another in a given language) Challenge: high variability in the acoustic signal must be reliably mapped to a stable linguistic representation. Phonemes are perceived categorically; potentially discriminable speech sounds are assigned to functionally equivalent classes. The goodness of fit of a statistical model describes how well it fits a set of observations. Measures of goodness of fit typically summarize the discrepancy between observed values and the values expected under the model in question. An infant"s perceptual ability to discriminate native language phonemes becomes so attuned that it becomes language specific. (werker and tees 1984) The formation of these phoneme categories alters our perceptual landscape so that our awareness of acoustic variation is reduced. Adaptation and experience information from other sensory systems. Resemblance: an analogy is made between two events.