Dissociation is a mental process that causes a lack of connection in a person’s thoughts, memory and sense of identity.Dissociation seems to fall on a continuum of severity.Mild dissociation would be like daydreaming, getting “lost” in a book, or when you are driving down a familiar stretch of road and realize that you do not remember the last several miles.ransient and mild dissociative experiences are common. Almost 1/3rd of people say they occasionally feel as though they are watching themselves in a movie, and 4% say they feel that way as much as 1/3rd of the time. The incidence of these experiences is highest in youth and steadily declines after the age of 20.