With that said, there are certainly times individual elements come to the forefront during a performance. The emotional tone of the piece might be the main focal point for a while, but then later proximity or movement qualities may be for forefront. Everything isn't always equal in ones attention, but they are always present. The emotional tone must be supported by the proximal relationship between performers as the movement quality is essential to the expressive nature of the moment. While at moments certain elements are more obvupious than others, but at those movements the other elements continue to support the whole.
Again, we first we differentiate the elements of improvisation (or, really any skill, activity, art). Once we begin to differentiate we also begin to integrate until we can hold both the individual elements and the whole of them. When this integration happens we are free to take the present moment together as a whole, or focus on one element or another. When we reach this point we have freedom of choice and freedom of attention and the real, deep practice of improvisation begins.
*Photo is of me and my company, The PlayGround, performing last December at Georgetown University Hospital, where we are the dance-company-in-residence.