THE GENESIS OF COMPLEX SENTENCES11This research was done at the Department of Psychology, M.I.T., where the author is a research associate. It was supported by a grant to Dr. J. A. Fodor from the National Institute of Child Health and Human Development (HD 05168). I take this opportunity to thank Dr. J. A. Fodor, Dr. M. F. Garrett, and especially my research assistant, Rhoda Goodwin for their contributions to this work.