[2] Often this is thought to be the root of the person's psyche, or at least a key figure for completion of therapy, whether or not it has integration of the host and alters as a goal.
[3] In some very mild forms of DID, the host can be present for extended periods of time, up to years without ever allowing an alter to take the forefront.
In severe cases, there is often large amounts of switching and the person may not spend that much time in any state, including the host.
There has been brain scan evidence to show that stressful or traumatic memories are often much more present in the alter personalities than the host.
[7] Since the host may not use the official name of the person, there can be disputes on which identities are responsible for an action.