Long-term and within-day variability of working memory performance and EEG in individuals

Assess individual-subject long-term and within-day variability of a combined behavioral and EEG test of working memory.EEGs were recorded from 16 adults performing n-back working memory tasks, with 10 tested in morning and afternoon sessions over several years. Participants were also tested after ingesting non-prescription medications or recreational substances. Performance and EEG measures were analyzed to derive an Overall score and three...