Mindfulness-based Cognitive Therapy (MBCT) was developed to prevent relapse in depression and has consistently been found to be effective in a series of randomised controlled trials. This kind of scientific evidence is required to validate a therapeutic intervention; be it a drug, psychotherapy, surgery or physiotherapy.
To be able to scientifically assess the effectiveness of any therapy, the first thing that needs to be established is that the therapy itself can be standardized so that the same treatment can be given to people with the same diagnosis to make sure that like is compared to like. This means that there has to be a high level of consistency in the expertise of the professional delivering the therapy. If the therapy is then going to be offered as a treatment after the trial, therapists have to be trained to the same standard as those who delivered the therapy in clinical trials. This is why there is a need for standardization of profession training for practitioners to deliver MBCT.
This all seems very sensible but issues around the regulation and standardization of mindfulness-based interventions and mindfulness teacher-training is not quite as straightforward as it may seem.