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To investigate the reliability of different EEG methods to detect behavioral evidence of language processing.

No gold standard currently exists for detecting language abilities in patients with traumatic disorders of consciousness (DOC).

EEG was acquired during rest and in response to spoken language in 16 controls in 16 controls (4F; age 28.5±7.8 years) and 17 patients with severe traumatic brain injury (4F; 4 coma, 1VS; 2MCS -; 4MCS+; 6PTCS; age 27.0±7 years; 9.5±4.8 days post injury). Three visual methods and an automated method of EEG analysis were used: 1) EEG background (Forgacs scoring, based on the American Clinical Neurophysiology Society criteria, ACNS); 2) EEG reactivity assessment upon language stimulation; 3) EEG background and reactivity assessment (Synek score) and 4) an automated classifier approach using a support vector machine (SVM …