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The Five Whys
The Five Whys is a simple yet powerful research method from human-centered design. Starting with a broad question about a person's habits or behaviours, you ask "why" five times in a row — not horizontally ("why else?") but vertically, going deeper with each answer until you uncover the emotional and human roots of a problem. The method takes only about 15 minutes, requires nothing more than pens and paper, and is designed to get to the core of a person's beliefs and motivations.