The left-brain, right-brain myth began with real research, but it actually oversimplifies how the hemispheres work. Perth: Are you logical, detail-oriented or good with numbers? You must be "left-brained." Creative, artistic and intuitive? You must be "right-brained." Personality quizzes and career advice passed. Perth, Oct 2 (The Conversation) Are you logical, detail-oriented or good with numbers?