Well looks like today is the day; there are now more than 100 published or in press randomised control trials on ACT (Acceptance and Commitment Therapy). This is the result of over thirty years of work, and development, and so far the model has been supported. Of course there is more work to be done in order to see where it is most effective, which components of the therapy work best in which situations and so on. As Steve Hayes, the primary developer of the model states
A while ago I did some work with a friend for an elite sports team. This got me thinking about the idea of mental toughness. A lot of people in sports, and those involved in other high performance activities talk about mental toughness. This ability, or characteristic is with out a doubt important in high pressure environments. The problem is that most people's understanding of what makes up mental toughness is quite limited. A common mistake is to see mental toughness as a sort of tough it out, push away the pain and get on with it attitude. Technically this is an avoidance strategy. While this can work well in the short term, it takes a lot of energy, and does tend to fail in some situations. It also tends to narrow our field of concentration, and limit our flexibility of responding to events.