People give out huge amounts of information from moment to moment. Changes in their emotional states and in what they are thinking about cause changes in their physiology. We can notice these changes – if we bother to look for them. Sometimes these changes are subtle, sometimes they are obvious.

If you notice a change in someone’s physiology or a shift in their voice tone that’s telling you that some sort of interior change has happened. If you observe it consistently happening in a particular situation, or in response to something that you’re doing, you can get an idea of what it means.

Sensory acuity in NLP is about paying more attention to what’s going on.