A psionic practice, the consciousness transfer, being performed on Jake Sully.
Psionics is the study and/or practice of using the mind to induce paranormal phenomena. Examples of this include telepathy, telekinesis, and other workings of the outside world through the psyche. Psionic technology was used in the Avatar Program.
In James Cameron's Avatar: The Game, the RDA attempted to use psionic devices to control the Tree of Souls in order to turn Eywa against the Na'vi.
Further Reading
- Wikipedia - Psionics article