This document, presented in two volumes, reports on a psychology of mathematics education conference, the theme of which was "Theoretical and Conceptual Frameworks in Mathematics Education." The two volumes include 58 papers, descriptions of 4 poster and 2 video presentations, and reports of and reactions to 2 plenary sessions presented at the conference. A grade (age) level index printed at the end of volume 1 helps readers identify presentations aimed at further exploring concepts and research issues of learners of particular developmental levels. A subject index at the end of volume 1 indexes all papers by topic. (MDH)