The CHILDES Project: Tools for Analyzing Talk (third edition): Volume I: Transcription format and programs, Volume II: The database

Thirteen invited papers from a two-day discussion session held in September 1999 are collected in this issue of Philosophical Transactions of The Royal Society. All the papers have been revised and edited, and the discussion following the presentation of each paper has been transcribed and appended. In addition, the editors have contributed a paper-length introduction. The contents are as follows: