This book examines the theoretical basis of one of the functional layers-the message layer-of an architectural theory of instructional design. The architectural theory (Gibbons, 2003; Gibbons & Rogers, 2009; Gibbons, 2014) identifies seven functions carried out during instruction that correspond with designable strata, or layers. The architectural theory proposes that for each layer there exists a specialized body of design languages, constructs, questions, tools, practices, processes, a professional community, and most especially, bodies of design theory. It also proposes that design knowledge from other design fields, many of which approach design from the same functional perspective, can be appropriated for the further development of knowledge within the instructional technology field. A robust literature from disparate fields supplies relevant theory for message layer design. This book builds the case for validation of the message layer by bringing together work from instructional theory, conversation theory, research in the learning sciences, intelligent tutoring system research, and K-12 education. Within this literature, the authors demonstrate the existence of the message as a structural abstraction: an independently designable entity. They trace the development of the message construct historically, showing that it has remained remarkably stable over time, independent of changing psychological, educational, and technological conventions.

Autorentext
Dr. Andrew S. Gibbons conducts research on the architecture of instructional designs. His book, An Architectural Approach to Instructional Design (Routledge, 2014), expresses a theory of instructional design layers, design languages, and modularity to aid the creation of more conversational, innovative, and interactive forms of instruction. Gibbons has also published a content domain theory of Model-Centered Instruction. His goal is to explore the use of layers, languages, and modularity as tools for creating instructional systems that are adaptive, generative, and scalable.
Elizabeth Boling is professor of instructional systems technology in the School of Education at Indiana University. Prior experience includes 10 years in design practice, five with Apple Computer, Inc. She has served as department chair, associate dean for graduate studies, and interim executive associate dean for the School of Education, Indiana University. Her research interests include visual design for information and instruction, and design theory, pedagogy and practice. She is past editor-in-chief of TechTrends, founding editor and current editor-in-chief of International Journal of Designs for Learning, lead editor the Routledge title Studio Teaching in Higher Education: Selected Design Cases and a co-editor of the forthcoming Handbook of Research in Educational Communications and Technology, 5thEdition.

Zusammenfassung
This book examines the theoretical basis of one of the functional layersthe message layerof an architectural theory of instructional design. The architectural theory (Gibbons, 2003; Gibbons & Rogers, 2009; Gibbons, 2014) identifies seven functions carried out during instruction that correspond with designable strata, or layers. 
The architectural theory proposes that for each layer there exists a specialized body of design languages, constructs, questions, tools, practices, processes, a professional community, and most especially, bodies of design theory. It also proposes that design knowledge from other design fields, many of which approach design from the same functional perspective, can be appropriated for the further development of knowledge within the instructional technology field. 
A robust literature from disparate fields supplies relevant theory for message layer design. This book builds the case for validation of the message layer by bringing together work from instructional theory, conversation theory, research in the  learning sciences, intelligent tutoring system research, and K-12 education. Within this literature, the authors demonstrate the existence of the message as a structural abstraction: an independently designable entity. They trace the development of the message construct historically, showing that it has remained remarkably stable over time, independent of changing psychological, educational, and technological conventions. 

Inhalt
Chapter 1 Instruction as a Conversation: The Imperative for Message Layer                    Design
            1.0 Introduction and Overview
            1.1 Instruction as a Conversation: Four Assumptions
            1.2 What Constitutes a Conversation?
            1.3 Forms and Dimensions of Instructional Conversations
            1.4 The Architectural Theory of Instructional Design:
                  Introduction of Terms
                        1.4.1 What Kind of Theory?
                        1.4.2 Why An Architectural Approach?
                        1.4.3 The Design Layers
            1.5 Layers During Design and Instruction
                        1.5.1 Layers During Design
                        1.5.2 Layers During Instruction
            1.6 The Message Layer in Relation to Other Layers
            1.7 Conclusion
Chapter 2 Conversation Theory and the Message Construct
            2.0 Conversation Analysis and Conversation Synthesis
                        2.1 A Generalized Model of Conversation
                        2.2 Conversation Analysis vs. Conversation Synthesis
                        2.3 A Theory of Conversational Structure
                                    2.3.1 Conversational Analysis and Morphological
                                             Elements of Conversations
                                    2.3.2 How Strategic Intentions Are Expressed
                                             Through Morphological Elements
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