Roor, Jeroen J, Knoop, Hans, Dandachi-FitzGerald, Brechje et al. · Applied neuropsychology. Adult · 2020 · DOI
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.
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.
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.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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