There are a variety of psychological constructs that have appeared in the literature that directly concern themselves with ego & psychological boundary properties & functions. Though most widely known as Openness due to its representation as a major trait of personality as per the Five Factor Model of personality, this trait, along with the notions of ego permissiveness, boundary thickness, & transliminality all relate to the extent to which the ego boundaries are able, on structural grounds, to permit information from different parts of the total psyche or personality to cross into conscious awareness. To further illustrate this point, specific to the idea of openness ... 'openness is seen in the breadth, depth, & permeability of consciousness, and in the recurrent need to enlarge and examine experience'. Research has shown that malleable/permeable ego boundaries are associated with a number of variables including higher levels of reported spiritual & non-ordinary states of consciousness as well as to both growth enhancing & pathological states."
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