Feedback on underperformance in patients with Chronic Fatigue Syndrome: The impact on subsequent neuropsychological test performance.
Roor, Jeroen J, Knoop, Hans, Dandachi-FitzGerald, Brechje et al. · Applied neuropsychology. Adult · 2020 · DOI
Quick Summary
This study looked at whether telling ME/CFS patients about their poor performance on memory tests could help them do better on brain function tests afterward. Researchers gave one group of patients feedback about underperformance while another group got no feedback. The group that received feedback showed meaningful improvement in processing speed (how quickly the brain handles information), suggesting that simple feedback might help doctors get a more accurate picture of a patient's actual cognitive abilities.
Why It Matters
ME/CFS patients often show apparent cognitive underperformance on standardized tests that may not reflect true ability. Understanding whether simple feedback can improve test performance has important clinical implications for accurate diagnosis and assessment of cognitive dysfunction in this population. This work highlights the potential for optimizing neuropsychological evaluation methods to reveal patients' actual cognitive capabilities.
Observed Findings
The feedback group showed significantly improved Complex Reaction Time performance at follow-up compared to the control group.
Both groups demonstrated substantial spontaneous improvement on the Amsterdam Short-Term Memory Test at re-administration, independent of feedback.
A comparable trend (not statistically significant) toward improvement was observed in the Symbol Digit Test for the feedback group.
The two groups were well-matched on baseline demographic and clinical characteristics.
Inferred Conclusions
A limited feedback intervention on underperformance may improve information processing speed performance in ME/CFS patients.
Such interventions might be clinically relevant for maximizing the accuracy of cognitive assessment in this population.
PVT failures in ME/CFS may partially reflect effort or motivational factors that respond to feedback, rather than being purely reflective of true cognitive limitation.
Remaining Questions
What specific elements of the feedback intervention were most effective in promoting improvement?
Does improved test performance following feedback correlate with improvement in real-world cognitive function or symptoms?
How durable are the observed improvements, and do they persist at longer follow-up periods?
What This Study Does Not Prove
This study does not prove that feedback improves actual cognitive function or real-world performance in ME/CFS—only that it may improve test scores. The observational design cannot establish causation or rule out confounding factors. The study also does not clarify whether observed improvements reflect genuine enhancement of cognition, increased effort, or other psychological factors. Generalizability is limited by the small sample and specific feedback approach used.
Tags
Symptom:Cognitive DysfunctionFatigue
Method Flag:Weak Case DefinitionSmall SampleExploratory Only