by Dwelt » Sun Oct 09, 2022 10:40 am
"Parts" is usually (not always) used in the context of the theory of structural dissociation of the personality, and means any type of dissociative parts, from the less dissociated ones you can find in PTSD/C-PTSD to the highly dissociated ones in DID.
"Alters" are a type of dissociative parts you find only in DID, and OSDD (DSM) / partial DID (CIM). They are considered to be the most dissociated parts, they have their own memories and sens of self, and they can take partial to full control of the body.
"Fragments" are a type of dissociative parts in a DID/OSDD/pDID system that are less complex than the others in one or (usually) multiple aspects : they can hold a single memory, only be able to act a single behavior, have few to no conscious of the present time, etc.
An alter only able to run away and hide when they are triggered, without any conscious of the context or time, can be considered a fragment. An alter with very complex behaviors, but almost no memory can be considered a fragment. The precise definition really depends on people.
Just be aware that not everyone like to use those terms. Some people find "parts" or "fragment" to be offensive, and some think "alter" doesn't depict well how they feel as a system and prefer the word "part". Some people even reject all "medical" language and prefer to use "headmates", or other terms like this one.
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French person with ADHD
Functional multiplicity, former partial DID