True; I think the rational stems from the following research questions: R1 - Is the entity a projection of the participant or manifestation of a separate entit

True; I think the rational stems from the following research questions: R1 - Is the entity a projection of the participant or manifestation of a separate entity? R2 - If the entity is a manifestation, can it process information that is not presented by the participant? R3 - Can that information be presented to another participant with the entity acting as an intermediary? This would expand on your idea of "if the same entity revealed itself to two participants", then perhaps having Person 1 receive musical input, describe the entity's reaction, Person 2 does not receive the musical input and describes the entity's behavior. If there is are common reaction behaviors between the entities, it wouldn't prove they are separate from the host, but could lead to additional types of studies.