L. Michael Hall Ph.D. In the field of NLP, the term sub-modalities  is a special term. Historically ,  writers have used it to refer to the sub- or small units that  are within any picture, sound, or sensation. In doing so ,  they have assumed that sub-modalities are a lower logical level than the  see-hear-feel modalities .  Yet is that true? What explains the fact that sub-modality mapping across and shifting do not always work? Could there be another mechanism that actuall