One of my first clients, in 1999, after doing a day's course on the Six Thinking Hats with me - this was in Cornwall at the time - wrote to me and said that since her course she is "less stressed and solves problems more easily".
The Hungerford Guidance Centre takes youngsters who are too violent to be taken by normal schools. David Lane, Principal, did a 20-year follow-up after the youngsters did some thinking lessons. 90% of those who did the lessons did not re-offend.
We also have evidence of people who have got off drugs through better thinking, and children in trauma, who have recovered more quickly, after using the Six Thinking Hats, in that case together with a psychologst, because mental attitude is not generally encouraged in hospitals, neither is thinking taught in our schools and universities.
Taking thinking lessons improves mental health because a person has greater self esteem, confidence, and sense of self-worth and achievement.
Once a person knows what to do in their mind when problems occur, the person becomes happy and fulfilled, with far less stress.