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Voice user interfaces (VUIs) are becoming all the rage today. But how do you build one that people can actually converse with? Whether you're designing a mobile app, a toy, or a device such as a home assistant, this practical book guides you through basic VUI design principles, helps you choose the right speech recognition engine, and shows you how to measure your VUI's performance and improve upon it.
Author Cathy Pearl also takes product managers, UX designers, and VUI designers into advanced design topics that will help make your VUI not just functional, but great.
Understand key VUI design concepts, including command-and-control and conversational systems
Decide if you should use an avatar or other visual representation with your VUI
Explore speech recognition technology and its impact on your design
Take your VUI above and beyond the basic exchange of information
Learn practical ways to test your VUI application with users
Monitor your app and learn how to quickly improve performance
Get real-world examples of VUIs for home assistants, smartwatches, and car systems
A Brief History of VUIs
Conversational User Interfaces
What Is a VUI Designer?
Chapter 2Basic Voice User Interface Design Principles
Designing for Mobile Devices Versus IVR Systems
Setting User Expectations
Command-and-Control Versus Conversational
Don't Blame the User
Novice and Expert Users
Keeping Track of Context
Help and Other Universals
Chapter 3Personas, Avatars, Actors, and Video Games
Should My VUI Be Seen?
Using an Avatar: What Not to Do
Using an Avatar (or Recorded Video): What to Do
When Should I Use Video in My VUI?
Visual VUI-Best Practices
Visual (Non-Avatar) Feedback
Choosing a Voice
Pros of an Avatar
The Downsides of an Avatar
Chapter 4Speech Recognition Technology
Choosing an Engine
The Challenges of Speech Recognition
Chapter 5Advanced Voice User Interface Design
Branching Based on Voice Input
Capturing Intent and Objects
Don't Leave Your User Hanging
Should the VUI Display What It Recognized?
Sentiment Analysis and Emotion Detection
Text-to-Speech Versus Recorded Speech
Chapter 6User Testing for Voice User Interfaces
Special VUI Considerations
Background Research on Users and Use Cases
Designing a Study with Real Users
Testing VUIS in Cars, Devices, and Robots
Chapter 7Your Voice User Interface Is Finished! Now What?
Chapter 8Voice-Enabled Devices and Cars
Cars and Autonomous Vehicles
Appendix Products Mentioned in This Book
Mobile Phone Assistants
Watches / Bands
Appendix About the Author