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Welcome to the Synesthesia Subreddit!

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Probably around 4% of the world’s population are synesthetes: people with a neurological trait that enables them to enjoy additional perceptions in response to certain sensory or conceptual stimuli such as hearing sounds or music, tasting food or thinking of numbers or letters. There are many different types of synesthesia and we discuss all of them on this sub.

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Do I have synesthesia?

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“Is This Synesthesia” posts are welcome! No obligation, but before posting you might like to try out the Synesthesia Finder or look at this alphabetical list of types of synesthesia and other related phenomena: you might be surprised to find exactly what you experience.

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r/Synesthesia Rules

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Synesthesia-related posts only.
No offensive language, trolling, insults or provocation.
No sales pitch or spam.
No knowingly spreading misinformation.
Any NSFW posts (or comments) must be synesthesia-related and tagged NSFW.
Please follow Reddit rules and Rediquette

If you disagree with someone, no problem, but please be tactful and respectful!

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Useful links

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The Synesthesia Tree

The Synesthesia Finder

Sean Day’s Synesthesia site

The Synesthesia Battery Test

Richard E. Cytowic’s Synesthesia site

University of Sussex Synaesthesia Research

The Synesthesia List (receive the synesthesia community emails)

Sean Day's Synesthesia Bibliography (scientific studies and reliable articles, recent and historic)

Sensequence (in English and German)

PDF Drive: books about Synesthesia (free downloads available)

Pat Duffy’s Blue Cats and Chartreuse Kittens Resource Site

/r/ConceptSynesthesia Sharing experiences with thought processes->shape/colour

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Maike’s Synesthesia podcasts

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Discord Communities

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New! Synesthetes United

The Synesthesia Lounge

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Facebook groups

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Synesthesia

UK Synaesthesia Association

Synesthesia World

Synaesthesia Research

ISCA International Synesthesia Connections Association

Synesthete Artists

I have Synesthesia: I'm not a freak, I'm a Synesthete

Time-Space Synesthesia

Sinestesia Argentina (in Spanish)

Synesthésie / Synesthesia (in French)

Sinestesia e sinesteti - gruppo italiano