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A number form is a mental map of numbers that automatically and involuntarily appear whenever someone who experiences number-forms synesthesia thinks of numbers. These numbers might appear in different locations and the mapping changes and varies between individuals.
How someone with grapheme–color synesthesia might perceive (not "see") certain letters and numbers. Grapheme–color synesthesia or colored grapheme synesthesia is a form of synesthesia in which an individual's perception of numerals and letters is associated with the experience of colors. Like all forms of synesthesia, grapheme–color ...
Semantic associations are how people assign meaning to concepts and play a significant role in certain types of synesthesia, particularly in linguistic-based forms like grapheme-color synesthesia. In these cases, specific letters or words evoke colors, suggesting that semantic processing may link otherwise separate sensory experiences.
Chromesthesia or sound-to-color synesthesia is a type of synesthesia in which sound involuntarily evokes an experience of color, shape, and movement. [ 1 ] [ 2 ] Individuals with sound-color synesthesia are consciously aware of their synesthetic color associations/ perceptions in daily life. [ 3 ]
The four pigments in a bird's cone cells (in this example, estrildid finches) extend the range of color vision into the ultraviolet. [1]Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye.
This can occur in people who had achromatopsia, but the brain recovered from the injury, restoring some colour vision. The person may be able to see certain colours. However, there are many cases where there is no recovery. Finally, a person with hemiachromatopsia see half of their field of vision in colour, and the other half in grey.
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Monochromacy (from Greek mono, meaning "one" and chromo, meaning "color") is the ability of organisms to perceive only light intensity without respect to spectral composition. Organisms with monochromacy lack color vision and can only see in shades of grey ranging from black to white. Organisms with monochromacy are called monochromats.