Analysis of information sources in references of the Wikipedia article "Spirit possession" in English language version.
Shamanism, religious phenomenon centred on the shaman, a person believed to achieve various powers through trance or ecstatic religious experience. Although shamans' repertoires vary from one culture to the next, they are typically thought to have the ability to heal the sick, to communicate with the otherworld, and often to escort the souls of the dead to that otherworld.
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: CS1 maint: publisher location (link)Regarding an experience as a possession-experience can serve a psychological need and be veridical at the same time. [...] [...] possession-experiences [...] can [...] provide prima facie justification for a set of beliefs regarding spirits and their natures.]