Sensory Acuity
Posted by Lloyd Johnson | Posted in Hypnosis, NLP, Posts with Videos | Posted on 17-03-2010
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In modeling Milton Erickson the creators of NLP observed that people make minute changes from moment to moment. Those changes have meaning if you have enough Sensory Acuity. So, what is sensory acuity? Sensory acuity is the ability to observe minute changes in a persons physiology from moment to moment. Based on the changes that you observe you can begin to gain an insight into what is going on for the other person.
In NLP they normally focus on these key parts of another persons physiology:
- Skin colour (Whether it is lighter or darker)
- Skin Tonus (Whether the tone of muscles is symmetrical or not symmetrical)
- Breathing Speed (Whether breathing is faster or slower)
- Breathing Location (Whether they’re breathing from higher or lower in their chest)
- Lower Lip Size (Whether it has more lines or less lines)
- Eye Focus (Whether their eyes are more focused or defocused)
- Pupil Dilation (Whether their pupils are more dilated or undilated)
The truth is that these are just a starting point – with enough sensory acuity you can easily gain insight into a persons state through any observable changes in their body. Milton Erickson famously noticed a member of one of his audiences going into trance. Later, he was asked how he knew she was going into trance. Milton replied, “I could tell because the pulse in her ankle slowed down”. The better you get at sensory acuity, the more powerful a communicator you will become! Sensory Acuity is especially vital in a good hypnotherapist as it is your only way of effectively gauging how quickly and deeply your client is in trance .
So, what is an example of this at work? Check out this YouTube video of the infamous Derren Brown at work with three car salesmen:
http://www.youtube.com/watch?v=Gi2cvop3vbM
This video is a great example of how Sensory Acuity can be subtly used to gain an insight into the internal representations of another person. Notice how with the third salesman Derren is able to determine when he is telling the truth without the salesman even opening his mouth. This is because of the subtle changes in his body language that Derren can easily pickup with his well practiced sensory acuity. Through the questions he asks he is able to calibrate, using sensory acuity, when they are telling the truth. Derren then simple picks the ‘odd one out’ (i.e. the answer where the persons physiology is noticeably different) and he can safely pick that as the lie.
It is important to note that sensory acuity must be calibrated on a person by person basis. The differences noticeable in one persons physiology who is telling the truth will not necessarily be the changes another persons physiology would show for the same internal representation.
The more you practice, the easier it gets. You can practice this on ANYONE you can see!


