Physiological signal “box”Here is a short overview of data types, how they are relevant for neuroergonomics, previous obstacles and recent trends.EEG: measures brain activity of neocortex (most developed part of the brain, responsible for who we are as humans).Relevance: direct tracking of mental states, emotions, mental workload, focus, etc. Great temporal resolution — relevant for real-time applications.Bottlenecks: for a long time too bulky, expensive and stationary for these applicationsRecent trends: EEG devices becoming smaller, cheaper and completely mobile (e.g. the author co-designed one such system). There are readily available solutions on the market.