Final Syllable Lengthening (FSL) in infant vocalizations This work was supported in part by a dissertation grant from the Purdue Research Foundation. We gratefully acknowledge the invaluable assistance of Michael Lynch in designing the study and of Pat Blackwell and Ayasakanta Rout in determining reliability. We would also like to thank the reviewers and Joe Dinapoli for their comments. Portions of this work were presented at the 1999 Child Phonology Conference in Wales.