Which of the following is NOT a good testing method?

The reasoning behind the selection indicates that correcting a user for their interaction with a prototype is not a good testing method. This is because effective user testing relies heavily on understanding genuine user behavior without any influence or direction. When users are corrected, it can lead to a situation where their natural responses and actions are altered, skewing the results of any testing that is being conducted.

Collecting user feedback, observing user interactions, and encouraging honest opinions are all practices that support gathering authentic insights. They allow designers to understand how real users engage with the product, which is essential for making informed design decisions. Users should feel free to explore the prototype in their own way without fear of correction, as this will lead to more accurate and useful feedback for the development process.