Dialogue experiments are typically used to heighten awareness of introjections and projections. In introjection, we uncritically take in aspects of other people, especially parents, and incorporate them into our personality.
The danger of uncritical and wholesale acceptance of another’s values as our own is that it can prevent personality integration.
Gestalt experiments are aimed at getting these introjections out in the open, so that we can take a good look at what we have been swallowing whole without digesting it.