To prevent the false-consensus effect in UX design, put in the effort to investigate user behaviors and preferences instead of just validating your own ideas.^[1] Use a variety of user research methods to gather insights from your actual target users, especially when you have doubts about design decisions.

For example, you can administer surveys or conduct user interviews to get in-depth feedback.

Another effective method is usability testing, where you observe users interacting with your design to spot any issues or unexpected behaviors. You can also use A/B testing to compare different versions of a design and see which one performs better with real users. This ensures that your design decisions are based on broad user feedback, not just your own assumptions and biases.