matching is adopting parts of another persons behaviour i.e. particular gestures, facial expressions, forms of speech, tone of voice etc. If subtly done it helps create a feeling of being similar or alike between people. Mismatching can be either conscious or unconscious behaviour. It has the effect of reducing rapport between people because a mismatcher does things differently from others, breathing at a different rate, speaking at a different tempo and so on. Mismatching can be a normal prt of focuses on difference.