Voice only
If you can answer with details or a simple yes to a question, tick it. There are matching links to articles to help you find an answer if you need more information.
User experience
Find out how users interact with the voice interface to optimize the user interaction for their purpose.
Consider that many users feel uncomfortable speaking loudly to a device in front of other people, in public places or even in their own private rooms.
Help users by providing help at all times throughout the interaction.
The user has control of each interaction at all times, but can also transfer control of the interaction to the system.
Communication
Communicate currently available options or errors while interacting with the voice interface.
Use everyday language and avoid technical jargon as this only confuses the user.
Users should always be able to remember voice commands. Wherever possible, show the user which interaction leads to which result.
Minimize the amount of information that is communicated to the user.