• Identity as curated feedback loop: Recommendation systems present users with algorithmically selected content that reinforces preferences and behaviors. Over time this selective exposure narrows the range of encounters and can turn provisional interests into stable self-conceptions (purposefully or inadvertently). People begin to infer who they are from what the system shows and what they engage with — a co-construction of identity between user and platform. (See: Pariser, The Filter Bubble, 2011.)

• Memory externalization and distributed remembering: Systems act as extended memory aids (e.g., playlists, “For You” feeds, watch histories). They store, highlight, and retrieve past choices, thus shaping what is remembered and how. Important moments or patterns may be amplified while others fade, altering personal narratives and collective remembrances. (See: Wegner, Transactive Memory, 1987; Hoskins, Digital Memory Studies.)

• Attention shaping and selective remembering: By prioritizing certain items (popular, novel, or monetizable), recommender algorithms direct attention and rehearsal — core processes for memory consolidation. Repeated exposure to algorithmically chosen content increases salience and recall, while neglected experiences become less retrievable.

• Identity fragmentation and echo chambers: Systems that tailor separately across domains (music, news, social media) can produce segmented selves: different curated feeds yield different behavioral profiles and memories in each domain, complicating coherent autobiographical identity. Closed recommendation loops also foster echo chambers that stabilize belief-based identities.

• Performative selfhood and reflexive curation: Knowing one is observed and scored, users adapt behavior to fit algorithmic expectations (self-presentation for better recommendations), which changes both enacted identity and the record those systems retain — making memory partly performative and mediated.

• Ethical and social implications: These shifts raise questions about autonomy, authenticity, and responsibility — who shapes identity and which memories count as authoritative? They also affect cultural memory by privileging platform-friendly content.

Concise references:

• Eli Pariser, The Filter Bubble (2011).
• Daniel M. Wegner, “Transactive Memory” (1987).
• Hoskins, Andrew, Digital Memory Studies (various).