A pilot evaluation of a randomised controlled trial (RCT) of Enhanced Thinking Skills versus Treatment as Usual in antisocial personality disordered offenders in the community

INTERVENTION: Enhanced Thinking Skills Cognitive Training versus Treatment as Usual CONDITION: Antisocial Personality Disorder ; Mental and Behavioural Disorders ; Antisocial personality disorder PRIMARY OUTCOME: Number of criminal offences during follow‐up, change in antisocial personality traits, change in antisocial attitudes, change in measures of risk. SECONDARY OUTCOME: Participants engagement in and satisfaction with the Enhanced Thinking Skills Therapy INCLUSION CRITERIA: 1. Male and female participants meeting the criteria for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM‐IV) antisocial personality disorder with a history of offending behaviour 2. Aged 18‐50 years 3. Participants will be recruited from the NHS and Greater Manchester Probation Service 4. Participants will have a history of antisocial behaviour and/or offending behaviour particularly violent offences