Targeting reasoning biases in delusions: A pilot study of the Maudsley Review Training Programme for individuals with persistent, high conviction delusions

► Delusions are resistant to change. ► Reasoning biases are thought to contribute to the maintenance of high delusional conviction. ► We have devised a computerised training programme targeting the 'Jumping to Conclusions' (JTC) bias and belief flexibility. ► In a case series evaluation, participants completing the training showed improvements in JTC, belief flexibility and delusional conviction. ► Larger-scale, controlled studies of this approach are warranted.