Using cognitive modelling to investigate the psychological processes of the Go/NoGo discrimination task in male abstinent heroin misusers

Aims To use cognitive modelling to investigate psychological processes underlying decision‐making in male abstinent heroin misusers (AHMs). Design A case–control study design. Setting A drug misuse treatment centre in Taiwan. Participants Eighty‐eight male AHMs and 48 male controls. Measurements Four parameters representing the attention to wins, learning rate, response sensitivity and incentive of heroin‐related stimuli from the modified Go/NoGo discrimination task. Findings A modified cue‐dependent learning (CD) model with four parameters representing attention to wins, learning rate, response sensitivity and incentive of heroin‐related stimuli had a lower value of the sum of Bayesian information criterion (showing a better fit) than the original CD model (9555.50 versus 11 192.22, P