I think it is very much a case of the whole being the sum of its parts and the eyes are in my opinion a part. Quite a few people have told me they are finding it disturbing when being treated by medical staff whose faces are covered because they are wearing masks. So I think we are subconsciousjy taking in a lot of information from expression and I think the more experienced a psychiatrist becomes the better s/he will become at being informed by reading demeanour and expression of which I think the eyes play an integral part.
Absolutely true.
We read people far more than we realise. And eyes are DEFINITELY the biggest give-away if all. Eyes express emotions ,everyone is aware of that.
And as you say, the whole package — their demeanour, body movements, expressions, sudden subtle jerks of the the foot when they’re lying, glancing away, or staring intently, rubbing their nose or wiping their hands by their mouth when they’re lying, rapid blinking, stance, distance, altered tone in speech...even down to how they present themselves, speak, manners...and smell too. We all have our own individual scent which can attract or repel. Some mental disorders can cause strange body odours, and some people claim people with a PD omits a certain odour..
I definitely believe the Internet has helped evil people scam, fool and con. Women can’t gauge men online or just by letters and an occasional phone call. That’s why Jeremy Bamber finds it so easy to bamboozle certain women (and men): they don’t know him. He’s just text on a screen; words in letter; and the occasional rushed call where you don’t have time to talk at length .