This introductory chapter discusses the field of natural and multimodal interactivity engineering and presents the following 15 chapters in this context. A brief presentation of each chapter is given, their contributions to specific natural and multimodal interactivity engineering needs are discussed, and the concepts of multimodality and natural interactivity are explained along with an overview of the modalities investigated in the 15 chapters.
Bernsen, N. O., & Dybkjær, L. (2005). Natural and Multimodal Interactivity Engineering - Directions and Needs (pp. 1–19). https://doi.org/10.1007/1-4020-3933-6_1