 This study investigated the effects of task manipulations on the cognitive demands of natural activities by examining the event-related electroencephalogram, EEG, activity of participants while they worked in a power plant operator simulation. Results showed that posterior N1 and P3 amplitudes increased when participants were engaged in more complex tasks, suggesting greater cognitive effort. Frontal theta power and parietal alpha power decreased when participants were engaged in more complex tasks, indicating heightened cognitive engagement. Higher theta connectivity was also observed in frontal parietal-centro-temporal occipital regions as task demands increased, suggesting increased communication between brain regions. These findings suggest that i-blink-related EEG activity can be used to gain a comprehensive understanding of neurocognitive processing while working in realistic environments. This article was authored by Amod Alien, Edmund Washer, Stefan Arno, and others. We are article.tv, links in the description below.