Takeaway
In those with functional movement disorders (FMD), there is an increase in reaction time which may be attributed to response uncertainty and impairment in the quality of information driving decision-making processes (reduced drift rate).
Why this matters
The reduced drift rate in those with a variety of FMD indicates that it may serve as a biomarker for impaired information processing in a common disease framework for neurobiological deficits of multiple FMD.