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Voice Assistants and How They Work

What happens when you talk to Alexa, Siri, or Google Assistant; they listen, try to understand, look up answers; sometimes they get it wrong; they are tools, not alive

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What a learner can do afterwards

  • Describe the steps that happen when you ask a voice assistant a question (it listens, processes words, finds an answer, speaks back)
  • Give an example of a time a voice assistant might get something wrong
  • Explain that a voice assistant is a computer program, not a person — it doesn't understand or feel

The lesson

Alexa, Siri, and Google Assistant are voice assistants. You talk to them, and they try to help you. They follow the same four steps every time.

ListenUnderstandFind answerSpeak
Watch the order: listen, understand, find an answer, then speak.
Try it together

Ben asks his speaker, 'What is seven plus three?' It listens, then says 'Ten.' One day, he asked for a joke. It played music instead. It heard the wrong words.

Good to know

A voice assistant is not alive. It does not have feelings. It is a computer program that follows rules.

A voice assistant listens and answers, but can still be wrong.

Watch it

Where it sits

Where this leads

Jobs that lean on this skill. Follow one to see everything it is built on.

Then practise

8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.

Voice Assistants and How They Work · Computing, ages 5 to 7 · LightMySky