Word-final strength and weakness

Word-final syllables are known to show phonological strength, presumably due to final lengthening (Steriade 1994; Barnes 2002), but also phonological weakness. We propose that final weakening effects are also due to final lengthening under the assumption that duration due a phonetic source (i.e. final lengthening) is not on linguistic par with duration from a phonological source. We show further support for our proposal through the results of perception studies with adults that show less sensitivity to word-final duration differences. We note that child language phonology often shows unexpected final syllable strength and include two such diary studies with English-learning children. We propose that this difference between child and adult phonology is due to children not yet having learned to differentiate the import of duration based on its source.