This study is an in-depth description of the application of Cognitive Control Therapy (CCT) in regard to an adolescent with Down syndrome. The literature review revealed a dearth of knowledge on the cognitive development and functioning of adolescents with Down syndrome. The interpretivist research paradigm was used as a philosophical basis for the qualitative case study that created an opportunity for close observation and critical reflection. The primary method of enquiry consisted of interliking therapeutic sessions during which CCT was applied as an intervention technique. The data generated through this process were verified in terms of recent literature, interviews and observations. The data analysis served to highlight the interactive relationship between such aspects as the adolescent’s genetic predisposition, as well as physical and psychological factors which to a large extent, influence the cognitive functioning and development, and therefore also the learning ability of the adolescent with Down syndrome. The findings show that the application of CCT resulted in an improvement (although limited) in the adolescent’s metacognitive abilities and distractibility and that there was a measure of transference in regard to the social and emotional domains. In conclusion, it appears that CCT was an effective intervention strategy for this adolescent because it accommodated his specific learning style. / Dissertation (MEd (Educational Psychology))--University of Pretoria, 2006. / Educational Psychology / unrestricted