Effects of Transcranial Direct Current Stimulation on Reward Learning in Subclinical Depression.

Plain-language summary

This project will test whether transcranial direct current stimulation (tDCS) over the dorsolateral prefrontal cortex (DLPFC) can alter reward learning behaviour in subclinical depression. tDCS is a neuromodulation technique that uses weak electrical current to increase (anodal stimulation) or decrease (cathodal stimulation) the excitability of the stimulated brain region. A growing body of evidence indicates that repeated administration of prefrontal tDCS can ameliorate symptoms of depression. A main characteristic of depression is that patients show a bias towards processing negative relative to positive information. Previously, we have found that a single session of prefrontal tDCS applied during task performance increased learning rate for reward outcomes in healthy adults. Here, we will test whether stimulation induces a similar behavioural effect in individuals with subclinical depression. We will test the prediction that tDCS will increase learning rates for reward outcomes in a reinforcement learning task. The findings will contribute to understanding the cognitive effects of prefrontal tDCS in subclinical depression. The ultimate aim, to be explored through further studies, is to understand and improve how tDCS might be used in the treatment of depressive disorders.

Who can participate

What they're measuring

Trial details