Eidetic

Eidetic memory (/aɪˈdɛtɪk/; sometimes called photographic memory) is an ability to vividly recall images from memory after only a few instances of exposure, with high precision for a brief time after exposure, without using a mnemonic device. Although the terms eidetic memory and photographic memory are popularly used interchangeably, they are also distinguished, with eidetic memory referring to the ability to view memories like photographs for a few minutes, and photographic memory referring to the ability to recall pages of text or numbers, or similar, in great detail. In the case of distinguishing the concepts, eidetic memory has been documented while photographic memory has never been demonstrated to exist.

Eidetic images occur in a small number of children and generally are not found in adults. The word eidetic comes from the Greek word (pronounced [êːdos], eidos, "seen").

The terms eidetic memory and photographic memory are commonly used interchangeably, but they are also distinguished. Scholar Annette Kujawski Taylor stated, "In eidetic memory, a person has an almost faithful mental image snapshot or photograph of an event in their memory. However, eidetic memory is not limited to visual aspects of memory and includes auditory memories as well as various sensory aspects across a range of stimuli associated with a visual image." Author Andrew Hudmon commented: "Examples of people with a photographic-like memory are rare. Eidetic imagery is the ability to remember an image in so much detail, clarity, and accuracy that it is as though the image were still being perceived. It is not perfect, as it is subject to distortions and additions (like episodic memory), and vocalization interferes with the memory."

"Eidetikers", as those who possess this ability are called, report a vivid afterimage that lingers in the visual field with their eyes appearing to scan across the image as it is described. Contrary to ordinary mental imagery, eidetic images are externally projected, experienced as "out there" rather than in the mind. Vividness and stability of the image begins to fade within minutes after the removal of the visual stimulus.Lilienfeld et al. stated, "People with eidetic memory can supposedly hold a visual image in their mind with such clarity that they can describe it perfectly or almost perfectly [...], just as we can describe the details of a painting immediately in front of us with near perfect accuracy."

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