Think-aloud protocol is a research method in which a user verbalizes their thoughts, actions, and decisions aloud while interacting with a product or performing a task.

It helps to understand how the user perceives the interface, what difficulties they encounter, and what motives drive their actions.

Example of use: during prototype testing, the user describes aloud what they see and why they click on certain elements. This helps identify unclear or inconvenient aspects of the design.

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