How we match groups

Why we match deliberately

After selection, participants are sorted into peer groups of three to five. We match deliberately, and we publish how, because good groups don’t happen by chance. A few evidence-based criteria meaningfully improve trust, openness and the quality of conversations.

The goal isn’t a perfect match – it’s a well-balanced one: enough common ground for psychological safety, enough difference for useful friction.1

What we match on

Three things matter most, in this order:

  1. Goals & learning orientation (most important) – is someone genuinely here to grow, or to perform? Groups where everyone shares a real learning orientation work best.2
  2. Shared values & deeper alignment – surface similarities (age, job title, background) create quick rapport but fade. Shared values are what sustain a group through the adjustment phase (roughly weeks 4–10), after the novelty wears off but before deeper trust forms.3
  3. Practical fit – schedule overlap, time commitment, format. It can’t make a match, but it can break one.

On personality: the evidence on personality matching is mixed,4 so we capture communication style instead – it’s more actionable for peer mentoring.

Similarity vs complementarity

  • Match alike on: goals, learning orientation, availability, and feedback expectations.
  • Mix on: communication style and experience level. A trio of all-introverts (or all-dominant speakers) stalls; a trio all at the same career stage misses the cross-pollination.
  • Separate where needed: anyone whose time commitment or expectations are significantly out of step with the rest.

Building good groups

  • Shared values, mixed experience – the same things matter to them, but they’re at different points in their journey. Everyone teaches, everyone learns.
  • Don’t isolate anyone – if two members are highly extroverted and one isn’t, the quiet one disappears (same goes for values or life stage). Pair the outlier with someone similar, or rebalance.
  • Compatible, not identical goals – if everyone chases the exact same outcome, the conversation narrows and the cross-pollination is lost.
  • Schedule reality wins – a good-enough group that can meet beats a perfect one that can’t.

The matching process

  1. Intake – everyone completes the matching form before groups are confirmed.
  2. Cluster by goal – sort responses into goal groups (skill-building, accountability, confidence, exploration…).
  3. Score values overlap – aim for at least two values shared across members’ top-3, and every member sharing at least one top-3 value with someone else.
  4. Filter for logistics – a group needs three or more overlapping weekly time slots.
  5. Composition check – no isolated outliers; mixed experience; at least one comfortable initiator; a mix of communication styles.
  6. Sense-check – separate known conflicts or relationships (same workplace, prior friction at selection).
  7. Human review – always.
  8. Check in early, mid and later (around weeks 2, 6 and 12) – week 2 catches structural issues, week 6 catches values friction, week 12 decides whether to continue or rotate. Adjust early, not after months of awkwardness.

Adapted for groups from the University of Warwick’s peer-learning pairing guide.5

References

  1. Mannix, E., & Neale, M. A. (2005). What differences make a difference? The promise and reality of diverse teams in organizations. Psychological Science in the Public Interest, 6(2), 31–55. doi.org/10.1111/j.1529-1006.2005.00022.x
  2. Payne, S. C., & Huffman, A. H. (2005). The impact of learning goal orientation similarity on formal mentoring relationship outcomes. Advances in Developing Human Resources, 7(4), 471–487. doi.org/10.1177/1523422305279679
  3. Harrison, D. A., Price, K. H., & Bell, M. P. (1998). Beyond relational demography: Time and the effects of surface- and deep-level diversity on work group cohesion. Academy of Management Journal, 41(1), 96–107. doi.org/10.2307/256901
  4. Menges, C. (2016). Toward improving the effectiveness of formal mentoring programs: Matching by personality matters. Group & Organization Management, 41(1), 98–129. doi.org/10.1177/1059601115579567
  5. University of Warwick (2024). Pairing-Up Guide. warwick.ac.uk

Practitioner frameworks referenced elsewhere on this site (widely used in workplace settings; not peer-reviewed): Social Styles (TRACOM Group); DiSC.

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