About Voice Principles
Voice Principles is a curated collection of best practices for designing voice interfaces. It compiles guidelines from major platforms like Amazon Alexa, Google, Apple, and Microsoft, along with expert insights from books and articles. The resource covers conversation design, error handling, user expectations, and accessibility to help developers create intuitive and effective voice-driven experiences.
FAQ
Key principles include making it clear how customers can benefit from your skill, designing for natural language conversation, being brief and relevant, and handling unexpected user utterances gracefully.
Design for when things go wrong by providing helpful reprompts, pivoting to another question, and failing gracefully. Avoid blaming the user and use contextual clues to disambiguate ambiguous information.
Best practices include sounding natural, being cooperative, taking turns, preventing errors by expecting variations, and providing helpful reprompts or pivoting to another question.
Design experiences for everyone by making interactions time-efficient, providing context, and prioritizing personalization over personality. Use audible or visual cues to communicate system delays.
Ask questions that have distinctive, easy-to-say answers, provide no more than three options when offering a choice, and use a warm, friendly tone. Avoid rhetorical questions and error loops.
Ensure consistency in language, voice, modality, and across exchanges and contexts. Know the user's preferences and level of expertise, and anticipate their requests.
Principles include treating conversations as a user interface, following familiar sequences, maintaining context, and using emotive expressions to build trust.
Make the voice interface naturally discoverable by allowing users to understand what is possible through natural discovery and providing meaningful examples of what they can say.
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