The science of smart assistants

Ever noticed how Alexa, Siri, or Google Assistant seem to get smarter the more you use them? They're not just voice-activated gadgets - they learn from your habits and use data science to give better responses over time.

From setting reminders to controlling smart devices, they're always improving to anticipate what you need.

Use the interactive panel to compare four ways a system might try to improve, then answer below.

Which data science technique helps virtual assistants get smarter with each interaction?