As such things happen, several manuscripts in the present volume were under review prior to the ones that appeared in Volume I of the Annals. A major difficulty encountered in the preparation of these volumes apart from working up to three years in advance of publication-is elic iting appropriate commentary. If this format is to succeed, the com mentary must be both engaging to the reader and satisfying to the author. It is not yet clear how successful we have been in this regard and, indeed, we do not feel bound to publish commentary with each manuscript that is accepted for publication....

As a follow up to Volume 7, contributors continue to explore the latest developments in developmental psychology. Here, researchers focus on the integration of theory and research and evaluates theoretical progress and advanced research. Continuing with the successful format of previous volumes in Annals of Theoretical Psychology, Volume 10 presents four major contributions-each accompanied by commentaries and replies to commentaries.

This is the first of a two-volume work in the Annals series devoted to developmental psychology. The project was originally conceived in 1985 when Paul van Geert, who had just completed his Theory building in developmental psychology (North Holland, 1986), agreed to col- laborate on anAnnals volume examining foundational issues pertaining to the concept of development. The project attracted considerable interest and, in view of the length of the resulting manuscript, a decision was made to publish it in two volumes. Fortunately, the contributors provided coherent perspectives on two...

The present volume is a continuation of Volume 8 in the Annals series. Together, Volumes 8 and 9 are intended to show the contribution of history to theory in psychology. Volume 9 contains three major papers and ten commentaries, the three major papers being History and System (Hans V. Rappard);

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...

I have been involved in constructing a unified theory for many years, in considering the state of psychology's unity-disunity, and in generally attempt- ing to persuade our profession to work on its unification. In this work I have had the opportunity to become acquainted with the works of a number of other psychologists whose statements indicated that they had something to say on these topics. I saw also that it would be very productive for psychology to have these individuals address themselves to psychology's disunity-unity, consid- ered as a problem that should be confronted and...

The present volume is a continuation of Volume 8 in the Annals series. Together Volumes 8 and 9 are intended to show the contribu- tion of history to theory in psychology. The reader is referred to the Introduction by Hans Rappard and Pieter van Strien, and the Preface in Volume 8 that serve as a prelude to the papers included in both volumes. Volume 8 includes three major papers: Psychological objects, practice, and history by Kurt Danziger, with commentaries by Mitchell Ash, Franz Samelson, and John Mills; History and the psychological imagination by Irmingard Staeuble, with commentar- ies...

The intention of this paper is to review the evidence support ing the major thesis that a knowledge of genetic architecture within a species gives clues to the evolution of behavior. To this end, a study of some of the origins of this idea, both within genetics and psychology, will be embarked upon, together with a review of the experimental evidence supportive of it. This review will concentrate on behavioral phenotypes, though not to the exclusion of other, usually morphological, character on which the original enunciation of the proposition was based. Essentially, the rationale is...