An interesting study to pursue that is somewhat abstract, but applicable none-the-less, would be to correlate interpersonal interaction (specifically verbal) with spacial relations.  Certainly this is not a novel idea as “physical visualizations” has served to maximize many aspects of self-healing in terms of meditation as well as other forms of psychological practices.  However, a call for an exclusive category of study for potential significance for this correlation might be something worth exploring.  Imagine a field of psychology, in terms of application, suggesting that means of supplementing passive language, or words of complimentary nature, be “visualized” as water passing over a shoreline.  Not after the fact, but during the process of verbalization.  Another example: points holding merit in terms of unbiased logic, be compared to a train breaking through a barrier of sorts.  Perhaps the notion that only anatomical allusions should be applied to be most efficient, then assertions would perhaps be compared to physical motions such as those present in martial-arts katas, Tai-Chi, Yoga, and/or simply basic human movements and gestures.

Certainly the use of visual, spacial, aids in endeavors of speech, persuasion and coercion are very evident, I think a specific study, separate from, but definitely relating to, that evidence might be something someone would like to pursue as an career undertaking.  Perhaps, and more than likely, it already exists and to a great extent.