This is a VERY high quality research paper that compared scoliosis specific exercise (such as Schroth) to traditional physiotherapy exercises on subjects with mild adolescent idiopathic scoliosis.

It is a randomized controlled trial looking at the effect of these two approaches on Cobb angle and on Quality of Life in subjects with Cobb angles <25˚ and much growth remaining (Risser 0-2). 'Active self-correction' and 'maintenance of the improved posture during functional activities' are two primary goals of the Schroth method. It found that the the programme of active self-correction and task-oriented exercises was superior to traditional exercises in reducing spinal deformity and enhancing the quality of life in patients with mild AIS. The effects lasted for at least 1 year after the intervention ended. The research was published in the well reputed European Spine Journal in 2014.
Very positive results for patients with mild scoliosis (<25˚ Cobb) and much growth remaining (early/pre adolescence: Risser 0 - 2).