Which of these is NOT one of the six modalities of calibration?

The six modalities of calibration in NLP include various sensory channels and physiological responses that practitioners observe to gauge a person's internal state. The modalities typically referenced include aspects like rate of breathing, location of breathing, pupil dilation, and more.

The height of voice is not traditionally listed among the six modalities of calibration. While voice qualities, including loudness or tone, can indicate emotional states, height of voice specifically does not constitute one of the primary modalities used for calibration in NLP practice. Hence, identifying height of voice as not being one of the core modalities aligns precisely with the definitions outlined in NLP.