language speech vol language speech volume april june structure development french prosodic representation claire gerard juliette clement syntactic persistence dutch robert j hartsuiker herman h j kolk metrical segmentation dutch vowel quality stress hugo quene mariette l koster listener detect disfluency spontaneous speech r j lickley e g bard heather b king editorial assistant language speech department linguistic tel university edinburgh fax adam ferguson build george square email lgsp ling ed ac uk edinburgh eh ll scotland uk http www ling ed ac uk lgsp 