1. Attention https://en.wikipedia.org/wiki/Attention
2. 8 Second Attention Span https://www.nytimes.com/2016/01/22/opinion/theeight-second-attention-span.html
3. Mindwave Mobile Brainwave sensing headset https://store.neurosky.com/pages/mindwave
4. Emotiv EPOC+ https://www.emotiv.com/epoc/
5. MUSE the brain sensing headband http://www.choosemuse.com