<unk>  is the condition of having extremely vivid mental imagery. It is the opposite condition to aphantasia, where mental visual imagery is not present. The experience of<unk>  is more common than aphantasia, and has been described as "as vivid as real seeing".<unk>  constitutes all five senses within vivid mental imagery; however, visual mental imagery research dominates the literature and there is a dearth of research on the other four senses. Research into<unk>  is most commonly completed by self-report questionnaires such as the Vividness of Visual Imagery Questionnaire (VVIQ), developed by David Marks in 1973, which evaluates the vividness of an individual's mental imagery out of a score of 80. Individuals scoring from 75 to 80/80 are constituted<unk> s, and are estimated to be around 2.5% of the population.
Hyperphantasia
Acrodynia
Palilalia
Hypoglossia
Hypophonia
Latrodectism
Tourettism
Misophonia