Cognitive remediation therapy in autism spectrum disorder: Tunisian experience.

Background: Cognitive dysfunctions associated with Autism spectrum disorder (ASD) are nowadays highlighted. These cognitive impairments include mainly executive dysfunctioning and are linked with academic difficulties, thus representing one of the treatment targets. Cognitive remediation therapy (CRT) is a new promising program aiming to remediate cognitive impairments by targeting executive functions. It attempts to teach information processing strategies through guided mental exercises.

Aim: To assess the effectiveness of the cognitive remediation program CRT (Cognitive Remediation Therapy) on executive abilities and school results, in children and adolescents with ASD.

Methods: Cross-sectional study involving children and adolescents with ASD according to DSM-5. The CRT program was conducted individually at the rate of one session per week of 45 minutes each.  Outcome measures were intellectual abilities, cognitive flexibility, working memory and school performance.

Results: Of the 25/24 patients included, 16 had reached the end of the program. Their average age was 10.87 years. The mean number of sessions performed was 22.38. After completion of CRT, patients showed significant improvement on intellectual abilities (p<10-3), phonemic fluency (p=0.032), « animal » category of semantic fluency (p=0.045), working memory (p=0.001 for forward digit-span and p=0.006 for backward digit span) and school results (p=0.001). Patients made more repetitive and intrusive errors in semantic fluency with significant increase in the "clothes" semantic category (p=0.019).

Conclusion: Cognitive remediation enhances cognition directly and positively acts on clinical course. It appears to be a relevant new method in the management of ASD. Yet, further research is required in order to confirm the efficiency of this treatment and to better define its optimal settings.