# Pool distributed evidence before the group converges

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Release: MHC-RPUB-20261011-9e4b62c5
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Help decision groups surface decision-relevant information that is unevenly distributed across members before repeated shared facts and early preferences dominate the discussion.
Collection kind: collection
Source: https://vedokrok.com/collections/pool-distributed-evidence-before-the-group-converges
Version: 0.1.0

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## Surface what the room does not already know

ID: MHC-D-RESEARCH-9227 · Version: 0.2.0 · Kind: protocol
Source: https://vedokrok.com/knowledge/surface-what-the-room-does-not-already-know

A discussion can sound informed while repeatedly circulating the same evidence.

### Use when

- Several people are about to make a consequential decision and relevant facts, constraints or signals are distributed across roles, functions or tools rather than already visible to everyone.

### Avoid when

- Unique does not mean correct, important or safe to disclose. Verify material claims and respect confidentiality, protected disclosures, legal privilege, medical privacy and formal security channels. Do not force a person to reveal sensitive information merely to complete the exercise. Much of the strongest evidence comes from laboratory hidden-profile tasks, and one structured procedure increased information exchange without reliably improving decisions. Treat pooling as an input to judgment, not a substitute for it. AI output belongs in the same evidence record only with provenance and verification appropriate to the stakes.

### Explanation

Before the group argues for an option, make the distributed evidence visible. Ask each participant to contribute decision-relevant facts that are not yet in the shared record, especially facts that weaken the apparent favorite or change the trade-off between options. Pool those contributions first, mark their source and uncertainty, then evaluate what the combined evidence implies. Hidden-profile research repeatedly finds that groups over-discuss common information and that better coverage of unique information is associated with better decisions. But surfacing information is only the first half of the job: the group still has to verify, weight and use it well.

### Steps

1. State the decision, the live alternatives and the few criteria that actually matter. Do not begin with a persuasive case for the current favorite.
2. Give each participant a short private pass to list one to three decision-relevant facts, constraints or observations they believe are missing from the shared record. Include disconfirming and option-specific evidence, not just support for a preferred answer.
3. Pool the entries before debating them. Mark what is genuinely new, what duplicates an existing fact, what conflicts with another source, and how certain or verifiable each critical item is.
4. Only then evaluate the alternatives. Verify consequential unique claims where feasible and record which newly pooled facts changed—or failed to change—the decision.

### Example

A team is deciding whether to move a customer-data flow to a new integration pattern. Architecture favors the cleaner design. Before choosing, security adds a token-lifetime constraint, operations adds a recovery-window fact, the functional consultant adds a downstream sequencing dependency, and finance adds a licensing threshold. The team evaluates the design against the pooled evidence instead of treating the architecture argument as the whole case.

### Check

Before the decision closes, the shared record contains each participant's material new evidence or an explicit 'nothing material to add,' critical contradictions are visible, and the group can name which unique facts affected the final ranking.

### Limits

- Unique does not mean correct, important or safe to disclose. Verify material claims and respect confidentiality, protected disclosures, legal privilege, medical privacy and formal security channels. Do not force a person to reveal sensitive information merely to complete the exercise. Much of the strongest evidence comes from laboratory hidden-profile tasks, and one structured procedure increased information exchange without reliably improving decisions. Treat pooling as an input to judgment, not a substitute for it. AI output belongs in the same evidence record only with provenance and verification appropriate to the stakes.

### Evidence and sources

- supports: A meta-analysis of 65 hidden-profile studies found that groups mentioned substantially more common than unique information; groups with distributed hidden information were much less likely to identify the best solution than groups whose members had full information, and broader coverage of unique information was positively related to decision quality. — RS-3FDCD04C8C72C7ED6F2E. The studies largely use constructed hidden-profile tasks. Their effect sizes should not be read as direct estimates for every workplace decision, and mentioning a unique fact does not make that fact true, important, or correctly used. (Abstract)
- supports: A meta-analysis of 72 independent studies involving 4,795 groups found team information sharing positively related to performance, cohesion, decision satisfaction and knowledge integration, with the sharing–performance relationship varying by whether sharing captured unique information, task type, performance criterion and discussion structure. — RS-764F8C9A4CC71B7E. The synthesis combines heterogeneous team tasks and measures. It supports attention to what is shared and how discussion is structured, not a universal causal effect for a specific meeting script. (Abstract)
- limits: In a controlled hidden-profile study, an advocacy decision procedure led groups to discuss more shared and unshared information than free discussion, but it did not reliably improve decision quality with experience. — RS-539815064BA12AAC6501. This is one structured laboratory procedure. It is retained to prevent the stronger claim that eliciting more information is sufficient for a good decision. (Abstract)
- contextualizes: A 2025 preregistered exploratory laboratory experiment with 215 individuals across 81 teams found that teams given an AI member with centralized decision-relevant knowledge made more accurate hidden-profile decisions than human-only teams, while teams whose AI knowledge was also asymmetric did not outperform the human teams. — RS-BA223F43F5D9546E8829. The study used one laboratory task and a particular ChatGPT-based setup. It does not show that organizations should centralize sensitive or authoritative knowledge in an AI system, nor that AI-generated information can be trusted without verification. (Abstract; study overview)
- RS-3FDCD04C8C72C7ED6F2E: Twenty-Five Years of Hidden Profiles in Group Decision Making: A Meta-Analysis — https://pubmed.ncbi.nlm.nih.gov/21896790/
- RS-764F8C9A4CC71B7E: Information Sharing and Team Performance: A Meta-Analysis — https://pubmed.ncbi.nlm.nih.gov/19271807/
- RS-539815064BA12AAC6501: Information Sampling and Group Decision Making: The Effects of an Advocacy Decision Procedure and Task Experience — https://doi.org/10.1037/1076-898X.12.1.31
- RS-BA223F43F5D9546E8829: How Can Teams Benefit From AI Team Members? Exploring the Effect of Generative AI on Decision-Making Processes and Decision Quality in Team–AI Collaboration — https://doi.org/10.1002/job.2898

No review details supplied.
Published: 2026-10-01T14:27:00Z
Related (useful_with): https://vedokrok.com/knowledge/keep-a-map-of-who-knows-what
Related (useful_with): https://vedokrok.com/knowledge/generate-human-options-before-asking-ai-for-ideas
