To those interested I looked for an experiment conducted by my university where students became beggars for a period and studied the reactions of those passing by. I could not find that document but here is one of a very similar nature by an individual who quantified the nature of the reactions he experienced.
http://joelrmontgomery.com/field-lessons/seeing-life-through-a-beggars-eyes/
The importance of body language as opposed to what we say or how we say it is well established. Approximately 80% of our input is what comes through our eyes (so good to be a photographer!
), it tends to override both language and tone where it is present. We automatically start to use our sense of others' body language from soon after birth. It's importance is why the visual arts are so engaging and its interpretation is seen in any analysis of such art, be it painting, sculpture, or the theatrical arts. That is why we can approach an image and get a sense of the social interaction, especially if we are looking at a familiar environment.
The sensitivity to posture and eye movement is much more ancient than us. Any pack hunting predators use similar changes of position to coordinate their attacks on prey. (I have yet to see a pack of lions sitting down with a white board pre-planning an attack strategy, but it would a great cartoon!
). As hunter-gatherers we have had to use similar alternatives to spoken language or major gestures to prevent spooking our prey, so we are naturally inclined to look for these subtitles of posture. In the few remaining hunter-gatherer societies left, such as the Pigmy people of West and Central Africa, one can still see exactly those subtle manifestations of body language in their hunting methods.