Transactional Analysis
https://www.amazon.co.uk/Today-New-Introduction-Transactional-Analysis/dp/1870244028/ref=sr_1_1?keywords=TA+today&qid=1555306165&s=gateway&sr=8-1
Random links
Why eye contact while talking is hard: https://www.thecut.com/2016/11/your-brain-cant-handle-words-and-eye-contact-simultaneously.html
Better link to BPS: https://digest.bps.org.uk/2016/11/18/why-its-hard-to-talk-and-make-eye-contact-at-the-same-time/
Précis: general cog functions used up by eye contact! So we have to be careful with expectations of eye contact in clients.