Over the past few years interest and research in experimental linguistics has shifted more toward centre stage, perhaps because of the growing recognition that purely theoretical formulations and speculations about language must necessarily be tested against the empirical facts of language knowledge, use, and acquisition. To highlight some aspects of empirical linguistics, a conference was organized in 1978 at University of Alberta, at which six prominent scholars were invited to present substantial contributions. These papers are included in this volume, together with an epilogue summing up and discussing the recurrent themes of the conference, and a general bibliography.