Introduction : From Terra Incognita To Terra Cognita : The Science Of Representation / Rodney R. Cocking -- Part I. Theories of Representation -- Approaches to Representation as a Psychological Construct : A Treatise in Diversity / Irving E. Sigel -- Cognitive Representations : Distinctions, Implications, and Elaborations / Michael E. Martinez -- Representation : Picture or Process? / April A. Benasich and Heather L. Read -- Early Symbolic Representation / Judy S. DeLoache and Catherine M. Smith -- What's in a Concept? : Context, Variability, and Psychological Essentialism / Susan A. Gelman and Gil Diesendruck -- Representing Logic / Ellin Kofsky Scholnick -- Constructivism, Communication, and Cooperation : Implications of Michael Chapman's "Epistemic Triangle" / Jeremy I.M. Carpendale -- The Properties of Representations Used in Higher Cognitive Processes : Developmental Implications / Graeme S. Halford -- A Dialectical Constructivist View of Representation : Role of Mental Attention, Executives, and Symbols / Juan Pascual-Leone and Janice Johnson -- Representation Once Removed : Children's Developing Conceptions of Representational Life / Michael J. Chandler and Bryan W. Sokol -- The Development of Representation as the Coordination of Component Systems of Action / Michael F. Mascolo and Kurt W. Fischer -- A Bakhtinian View of Egocentric Speech / Bruce Dorval -- The Nature and Development of Representation : Forging a Synthesis of Competing Approaches / James P. Byrnes -- Part II. Application of Representation in Practice -- Developing an Understanding of External Spatial Representations / Lynn S. Liben -- The Development of Representational Abilities in Middle School Mathematics / Richard Lesh -- Representational Issues in Assessment Design / Drew H. Gitomer and Linda S. Steinberg -- Representational Competence / Uri Shafrir -- Representational Thought in Ego Identity, Psychotherapy, and Psychosocial Developmental Theory / James E. Marcia -- The Use of Cultural Tools : Mastery and Appropriation / Leslie Rupert Herrenkohl and James W. Wertsch -- A Representational System for Peer Crowds / Jeffrey McClellan and James E. Youniss -- Part III. Visual Representation as Pictorial -- The Form of Thought / Sandra L. Calvert.