Nostalgia is distinguished from homesickness from which it was originally derived, and from fantasy to which it is related. It is described as an affective-cognitive experience, usually involving memories of places in one's past. These memories are associated with a characteristic affective coloration described as "bittersweet." It is concluded that the locales remembered are displacements from objects whose representation was repressed. Nostalgia is a ubiquitous human experience that is evoked by particular stimuli under special circumstances, and, while it is generally a normal occurrence, pathological

forms occur. Among those discussed are: nostalgia as a substitute for mourning, as an attempted mastery through idealization and displacement of a painful past, as a resistance in analysis, and as a counterphobic mechanism. Nostalgia not only serves as a screen memory, but may also be said to operate as a screen affect.