Cognitive-psychophysiological Treatment for Tics in Young People With Tourette's Syndrome With or Without Biofeedback

The goal of this clinical trial is to compare the effectiveness of CoPs therapy with or without the therapeutic component of biofeedback in treating tics in Tourette Syndrome with emerging young adults. Hypotheses: 1. The CoPs+Biofeedback treatment will improve the severity of tics (YGTSS) and the Clinical Global Impression, surpassing the clinical significance threshold of CoPs treatment alone. 2. We expect that the identified variables (psychosocial, neurocognitive, biological) will predict the improvement of tics. Researchers will compare if the biofeedback treatment will improve the severity of tics. * In the pre-test, participants will undergo two interviews, each lasting 3 hours. These interviews will assess (through a battery of tests) the severity of tics as well as the psychosocial, biological, and neurocognitive aspects of functioning. A general assessment of intelligence and executive functions will also be conducted. * They will next attend 10 to 12 therapy sessions, with or without biofeedback. (The biofeedback component is explained in more detail in the ''Study Design'' section). * The post-test follow-ups consist of two evaluations: one 3 months after the end of the treatment and the other 6 months after. The evaluation will be done using the same battery of tests as during the pre-test interview.