am i plural?

we can't answer for sure, but if you clicked on this website out of a true desire to answer that question it seems like a definite possibility!

that's ok! here are some resources we've found that might help with figuring this out, sorted into categories!

how do i know if i'm plural? (links to other resources within) exhaustive list of potential plural experiences both disordered and not. if you only click on one link on this page, we would recommend it be this one.
PQR (plural questioning resource). archived masterpost of discussion and advice regarding questioning; includes examples of things that could be mistaken for plurality. alternate/earlier copy here; we're not sure of every single difference but the "plural-ish stuff" section is absent from this one
how do I know i'm multiple? by sarah k reece. slightly medically slanted but ultimately comes down to exploring whether the framework of plurality is useful for you, which is origin-agnostic imo.
does it work? and the power of naming by the vickis. explores similar philosophical territory to the above bullet, focused on what i would loosely describe as "killing the anti self dxer in your head"
talking from "soul whispers" on tripod. a small test designed to help differentiate if you're worried you're "making" your headmates say something instead of them talking organically; from a soulbonding site (see "created and fiction-driven plurality") but probably applicable to most types of systems in the questioning phase/worried they're "making up" inner communication. adblocker is recommended to see the full page but the tip is visible without one
healthymultiplicity.com: general resource, recommended if you'd like an accessible 101 on various aspects of living while plural
vocab resources in order from smallest to largest: morethanone.info, the r/plural glossary, and pluralpedia
the null hypothecis is an article about transness, not plurality, which is why it's at the bottom of this list in the "resources" section, but it brings up a point i think has value for plural questioning conversations as well as trans ones: being "normal" (cis or a singlet) is not a null hypothesis, even though society trains us to think of it as one. or, in other words, while it might seem like you have to find insurmountable proof of plurality or you obviously must be "singlet by default", the fact you are seriously debating being plural is itself evidence that something is probably going on with your identity. (this is not as ironclad as with transness because, of course, more than one thing does cause identity disturbance, but i think the mode of thinking is worth trying if you are stuck in a loop of saying "oh, but i couldn't POSSIBLY be plural because...")

some clinical tools: the dissociative experiences scale-ii and multidimensional inventory of dissociation. these are diagnostic tools used in clinical settings to identify dissociative disorders in patients, and double as a good list of specifically dissociative experiences
diagnostic critera over the years. dsm criteria for did/mpd in all editions it has been included in, including a simple language explanation of the current criteria
you might be multiple if... generally medically focused list of things systems often do or experience
@headmatesfaq/tagged/questioning ~3 page plural questioning resource tag, skews medical

you could be median! a nice primer post, including examples of specific ways being median might feel ("You’re like a gemstone cut for a ring– all one stone, but there’s facets of you that reflect light just a little differently"), a section discussing things otherkin often describe that might actually fall under the median umbrella, and a brief faq with common questions
median is more than people with parts. another list of specific potential median experiences (e.g. "fragments in a trenchcoat- not more than one person, but more like 1.5 or less than one"), short and to the point
everyone has parts of themselves... a brief description of experiences that might be more median than singlet

how to tell if your imaginary friend is sentient. focused on accidentally created plurality; particularly applicable to fictional character muses or similar
soulbonds and rp muses: what they are and how to tell the difference. list of questions intended to help differentiate whether a mental presence is an rp muse or a soulbond (a form of plurality typically related to and/or initially mistaken for fiction writing)
you might be a soulbonder if... another "list of stuff plurals do", focused on soulbonding

finally, if reading through all that seems like a lot, here's an exercise taken from a lot of the linked articles:
just let yourself act on the assumption that you're plural for a little while and pay attention to how it feels. is it easy? is it hard? are you getting feedback you didn't expect?
don't feel pressured to express yourself like other plurals you may know. do what feels best for you.

ultimately, only you can know whether you're plural. but we hope this website at least helps a little! and whatever you end up being, we're cheering for you!