This document summarizes three chapters from a book on extending interaction through real and illusionary means. The first chapter discusses using sketches to explore interaction concepts and experience virtual interactions. The second chapter presents biofocal display, a new 3D sketching technique to represent virtual concepts. The third chapter discusses video envisionments, which envision potential future technologies and interfaces through video media instead of sketches, but aim to avoid misleading impressions of being presentations of real products.

1. Sketchinguserexperiences-Bill Buxton-ExtendingInteraction: RealandIllusion

2. Biofocaldisplay

3. Video Envisionmentfazıl akın

4. contextChapters’ aimExtendingInteraction: RealandIllusionBiofocaldisplayVideo Envisionment

5. Chapters’ aimExtending Interaction: Real and Illusion / paper represantationBiofocal display / paperand video represantationVideo Envisionment /video represantation

6. ExtendinginteractionSketchaffordstotheabilitytoexploreandexperiencetheinteraction.Thesketchaffords an instantappreciationfortheviabilityandvalidity of theconceptillusion of thereal“a number of simplecomplementarytechnique is usuallymoreeffectiveandeconomicalthanonecomprehensiveapproach.”