while the numbers of subjects was small (17 in each group), he found evidence to support his recommendation that, while teen challenge was an "effective" treatment (with a drug recidivism rate after 29 months of 32%), transactional analysis was a "very effective" treatment (with a comparable 16% rate), suggesting that perhaps the lower recidivism rates were a result of ta changing the addiction concept of the self-image more thoroughly and at a slower pace. he hoped that teen challenge would incorporate some psychotherapy into their treatment model.