AmCo working memory training

One way to reduce drug use or to even stop is by increasing cognitive control. This can be done by means of working memory training. This study examines the effect of working memory training on amphetamine and cocaine use in adults who want to reduce their use. Potential participants who read the information brochure and sign the informed consent online. Then they perform 25 days of working memory training independently. Subjects are blinded to whether they received the training or placebo variant. Before and after this period they will also complete a number of questionnaires about how much amphetamine or cocaine is used, the reasons for use and opinion about the training.

Working memory training increases cognitive control, thereby reducing the amount of amphetamine or cocaine used.

T1: creating account, assignment to amphetamine version or cocaine version, first day of training (questionnaires and training)

T2-T24: working memory training and questionnaires

T25: last working memory training and questionnaires.

T26: one-month follow-up on substance use

T27: three-month follow-up on substance use and information on training (training or placebo)

T28-T53: optional working memory training with real training when desired by participant

25 day online working memory training, consisting of one working memory task and several questionnaires. There is an adaptive training version and a non-adaptive placebo version.