D j vu is an uncanny feeling or illusion of having already seen or experienced something that is being experienced for the first time. If we assume that the experience is actually of a remembered event, then d j vu probably occurs because an original experience was not fully attended to and elaborately encoded.

Sometimes I hear people say, ...

This study shows there are at least four specific subtypes of d j vu corresponding to diagnostic categories and that such phenomenological experiences may be used in diagnosis and management.