SYNTHESIS NOTE
Psychology, Society, and Alignment Conversational AI and Personalization

How should chatbot design vary by relationship duration?

Do chatbots serving one-time users need different design than those supporting long-term relationships? This matters because applying the same design to all temporal profiles creates usability mismatches.

Synthesis note · 2026-02-23 · sourced from Design Frameworks
How do people build trust with conversational AI? How should researchers navigate LLM reasoning research?

Despite diverse chatbot characteristics investigated for design implications — general vs. domain-specific, dyadic vs. multiparty — there is a scarcity of research on design differences contingent on chatbots' temporal profiles. Since chatbots are social actors and time is essential to social interactions, the time horizon fundamentally changes what the chatbot IS.

A taxonomy of 22 design dimensions organized across temporal profiles yields three archetypes from analysis of 120 chatbots:

Ad-hoc Supporters — single or few occasional interactions. The chatbot is a "communication medium" (Zhao, 2006). Users seek to get something done quickly. Design priorities: task efficiency, low friction, minimal onboarding.

Temporary Assistants — multiple interactions over a defined period. Typical: an educational chatbot teaching a course's content over one semester. Design priorities: progress tracking, content scaffolding, periodic engagement.

Persistent Companions — long-term or life-long relationships. Users are committed to undergo longer personal learning or development processes. The chatbot becomes a "social actor" (Reeves & Nass, 1996). Design priorities: relationship continuity, memory, personalization, incremental self-disclosure.

Four temporal dimensions characterize any chatbot: (D1) time horizon of the relationship, (D2) duration of individual interactions, (D3) frequency of interactions, and (D4) consecutiveness — whether interactions build on each other or are independent.

The critical insight: the same chatbot DESIGN applied to all three archetypes produces a mismatch. An Ad-hoc Supporter designed with relationship-building features wastes user time. A Persistent Companion designed without memory or personalization decays into irrelevance. Since Do chatbot relationships lose their appeal as novelty wears off?, the Persistent Companion archetype faces a specific challenge that Ad-hoc Supporters never encounter.

A complementary 17-dimension taxonomy across intelligence, interaction, and context perspectives (Janssen et al., 2020) yields five archetypes: goal-oriented daily, non goal-oriented daily, utility facilitator, utility expert, and relationship-oriented. The overlap between the temporal and functional taxonomies suggests that time horizon and purpose are the two primary axes of chatbot design space.

Inquiring lines that use this note as a source 5

This note is a source for these synthesized inquiries. Follow a line forward into its question, or open it to trace back to all of its sources.

Related concepts in this collection 7

This note in its neighbourhood — explore the map, then jump to a related concept in the list below.

Concept map
15 direct connections · 114 in 2-hop network ·medium cluster Open in graph ↗

Click a node to walk · click center to open · click Open in graph to see this note in the full knowledge graph

your link semantically near linked from elsewhere

Related papers in this collection 8

Papers most semantically related to this note, ranked by cosine similarity in the embedding space.

Original note title

chatbot temporal design determines relationship type — ad-hoc supporters temporary assistants and persistent companions require fundamentally different design