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Lay therapist-delivered manualised CBT improves anger coping in people with intellectual disability and anger problems, but effects on anger measures mixed

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Question: What are the effects of manualised cognitive behavioural therapy (CBT) anger management in people with mild-to-moderate intellectual disabilities?

Participants: Two hundred and twelve individuals with mild-to-moderate intellectual disability and problem anger attending 1 of 30 participating day centres. Day centres were eligible if they reported anger problems in at least four service users who were prepared to participate; had at least two staff willing to be trained as lay therapists; had a supportive manager and facilities for group work; and were not already implementing anger interventions. Service users were eligible if they were able to use simple rating scales (as assessed by completion of the Comprehensive Quality of Life Scale—Intellectual Disability (ComQoL-ID) at baseline), wished to improve their anger, did not require psychological treatment for anger or aggression, and were not considered too vulnerable to participate.

Setting: 30 day centres for adults with intellectual disabilities in England, Scotland and Wales.

Intervention: Manualised CBT or treatment as usual waiting-list control over 12 weeks. In intervention centres, two to four staff per centre …

Correspondence to p.willner{at}

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  • Correspondence to:

  • Sources of funding: National Institute for Health Research (NIHR) Health Technology Assessment programme.


  • Competing interests None.