[1][3] American transpersonal philosopher Ken Wilber and English humanistic psychologist John Rowan suggested that the average person has about a dozen subpersonalities.
These include past and future selves, which together characterise thoughts and feelings, such as remorse, satisfaction, and doubt about the person we may have been previously, as well as hopes and worries about who we may become.
[6][7] Facilitating the identification and exploration of subpersonalities or possible selves is a strategy by which therapists seek to promote positive cognitive, emotional, and behavioural change in psychotherapy.
These include British psychotherapist Paul Newham who pioneered the therapeutic use of expressive arts to explore subpersonalites through costume, mask, drama, and voice.
[citation needed] Some studies have shown that subpersonality integration in the psychosynthesis therapeutic setting can help clients enhance creativity,[13] relieve anxiety, and rebuild their identities when dealing with culture shock.