Dr. Edward de Bono developed the Six Thinking Hats method to encourage parallel thinking over adversarial thinking. The Six Hats method involves assigning different colored hats to represent six types of thinking: white for facts, red for emotions, black for caution, yellow for positive aspects, green for creative alternatives, and blue for process control. When used in group discussions, the Six Hats method has participants focus their thinking in the same direction at once to avoid ego-driven arguments and instead take a collaborative, constructive approach to problem solving.