Cognitive behavioural family intervention (CBFI) may be an effective brief psychosocial intervention for people diagnosed with severe mental illness (SMI) and their families. No systematic review has summarised the effectiveness of CBFI.. To read the full article, log in using your NHS Athens details. To access full-text: click “Log in/Register” (top right hand side). Click ‘Institutional Login’ then select 'OpenAthens Federation', then ‘NHS England’. Enter your Athens details to view the article.