Is it possible to consciously create alternate personalities?

p.99-100 The Holographic Universe
"multiples also tend to heal faster than normal individuals. For example, there are several cases on record of third-degree burns healing with extraordinary rapidity. Most eerie of all, t least one researcher -Dr. Cornelia Wilbur, the therapist whose pioneering treatment of Sybil Dorsett was portrayed in the book Sybil - is convinced that multiples don't age as fast as other people.
How could such things be? At a recent symposium on the multiple personality syndrome, a multiple named Cassandra provided a possible answer. Cassandra attributes her own rapid healing ability both to the visualization techniques she practices and to something she calls parallel processing. As she explained, even when her alternate personalities are not in control of her body, they are still aware. This enables her to "think" on a multitude of different channels at once, to do things like work on several different term papers simultaneously, and even "sleep" while other personalities prepare her dinner and clean her house.
Hence, whereas normal people only do healing imagery exercises two or three times a day, Cassandra does them around the clock. She even has a subpersonality named Celese who possesses a thorough knowledge of anatomy and physiology, and whose sole function is to spend twenty-four hours a day meditating and imaging the body's well-being. According to Cassandra, it is this full-time attention to her health that gives her an edge over normal people. Other multiples have made similar claims."

When casting a circle, calling the quarters/elements and goddess/god, as well as working with a ritual or magical name, is it possible that we Witches are practicing the conscious crafting of multiple personalities? Could we create spells, meditations, and/or talismans/tools/symbols to be used by alternate personalities designed for specific purposes to "run in the background" as we go about our days?
I've noticed that when I actively meditate more often I not only experience an increased overall sense of well-being, but I also find I have more restful sleep - so much so that I can wake after resting half as long as I normally do and yet feel fully refreshed.