Notes that few phonemes exhibit greater variance in the membership of phonemes that make up an equivalency class than the phoneme represented by /r/. Points out that the relationship between the auditory features of the speech signal and phonetic classification provides insight into a language's encoding and decoding system. (23 references)…

The speech perception system must be flexible in responding to the variability in speech sounds caused by differences among speakers and by language change over the lifespan of the listener. Indeed, listeners use lexical knowledge to retune perception of novel speech (Norris, McQueen, & Cutler, 2003). In that study, Dutch listeners made…