I was asked and, alas, with little reflection on the magnitude of the task, thoughtlessly consented, to take on the 'simple' job of writing a preface to the collection of essays comprising this volume. That I was asked to carry out this simple task was probably due to one consideration: I was the main representative of the host institution (Clark University) for the 1991 ISTP Conference, at which the talks, foreshadowing and outlining the 'extended remarks' here printed, were originally presented, and hence, as a token of gratitude, I was vouchsafed the honor of setting the stage. It did not dawn on me, until I began piecemeal to receive and accumulate, over a period of months, the remarkably diverse and heterogeneous essays precipitated by the conference, how mind-boggling it would be to pen a preface pertinent to such an aggregate of prima/acie unrelated articles. Typically, prefaces to collections of essays from different hands are attempts by the prefator or a pride of prefators to provide an overview, a concise map, of the complex terrain which readers are invited to enter; or to direct the attention of potential readers to what the editors take to be the essential or central themes of each of the variegated articles: a practice which, not infrequently and often not unjustifiably, irritates and even enrages individual authors, who object to the complexity, profundity, and nuanced character of their thought being reduced to clicMs and editorial equivalents of sound bites.

This volume constitutes the proceedings of the second biannual conference of the International Society for Theoretical Psychology (see Epilogue) held in Banff, Alberta, Canada, April 20-25, 1987. Thirty-nine papers were presented during the four days of the conference including an invited address by Kenneth Gergen. Unfortunately, even after severely restricting the length of the written papers, the required limitation on printed space permitted only 34 of these to be included in these proceed ings. While most of the papers required editorial adjustment, the authors had final word on style and content. The classification of conference papers tends to be somewhat arbi trary' but we decided to structure the chapters under four headings: phi losophy, metatheory, methodology, and theory. By philosophy we refer primarily to issues in the philosophy of science as these pertain to the dis cipline of psychology. Metatheory refers to theory, drawing on the philo sophy of science and having implications for methodology, about psycho logical theories. Methodology refers to both theory of inquiry and specif ic methods of investigation as these derive from philosophical and meta theoretical considerations. By theory we refer to both analyses of the foundations of extant theory, including historical and sociological ana lyses, and the advancement of substantive theory.

This volume constitutes the proceedings of the third biennial conference of the International Society for Theoretical Psychology, held in Arnhem, the Netherlands, April 17-21, 1989. Fifty-six papers were presented during the four days of the conference, including an invited address by Professor A. D. de Groot, and seven papers composing two plenary sessions, four on the con tribution of history to theory, and three on theoretical alternatives for contem porary psychology. Of these, 46 papers are presented in the proceedings; all of which suffered editorial changes and, with the exception of the invited ad dress, were required to meet a 15 page restriction on length. The editors gratefully acknowledge John Mills, Leendert Mos, and Hank Starn for their invaluable editorial assistance. The papers included here are presented without discussants' commen taries. (Over 125 psychologists participated at the conference.) While the papers are representative of the scope of topics covered at the conference, the hours of formal and informal discussions must, unfortunately, be left to the reader's imagination. We encourage the reader to attend one of our next conferences, planned biennially, and alternately, in North America (1991) and Europe (1993).

An essential overview of theoretical issues in psychology with pedagogical features to help students identify key terms and concepts.