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In 2021, a study found that people with aphantasia have slower reaction times than people without aphantasia in a visual search task in which they were presented with a target and a distractor. But both groups saw a similar reduction in reaction time when primed with the color of the target compared to if primed with the color of the distractor ...
Hyperphantasia is the condition of having extremely vivid mental imagery. [1] It is the opposite condition to aphantasia, where mental visual imagery is not present. [2] [3] The experience of hyperphantasia is more common than aphantasia [4] [5] and has been described as being "as vivid as real seeing". [4]
4 "Claiming to have had a lifelong inability to ... scientific or anecdotal, of people who were cured from aPhantasia? 2 comments. 6 Coined in 2015? 2 comments. 7 ...
It seems like most or all of the people who are already on the list are self-reported—which makes sense, since aphantasia is primarily a subjective conscious experience. Even a formal medical diagnosis would most likely rely on self-reporting, albeit in a more formalized way (e.g. the VVIQ test).
Following that, there is a list of people who are often wrongly believed to have had synesthesia because they used it as a device in their art, poetry or music (referred to as pseudo-synesthetes). Estimates of prevalence of synesthesia have ranged widely, from 1 in 4 to 1 in 25,000 – 100,000.
A 1913 study by John E. Coover asked ten subjects to state whether or not they could sense an experimenter looking at them, over a period of 100 possible staring periods. . The subjects' answers were correct 50.2% of the time, a result that Coover called an "astonishing approximation" of pure chance.
Combing early studies, the traditional symptoms of CWS centered on visual irreminiscence (aphantasia), prosopagnosia, and topographic agnosia.However, due to significant differences in the observations of Charcot and Wilbrand's case work, this syndrome bridged the entire loss of dreaming, whether it be due to the isolated inability of the brain to produce images while asleep as Charcot had ...
In a technique known as blue field entoptoscopy, the effect is used to estimate the blood flow in the retinal capillaries.The patient is alternatingly shown blue light and a computer generated picture of moving dots; by adjusting the speed and density of these dots, the patient tries to match the computer generated picture to the perceived entoptic dots.