Retention Outreach Protocol¶
Operational protocol — instantiates Attrition and Dropout Monitoring
A pre-specified, evenly-applied routine for reducing avoidable burden and recovering endpoints — without turning a participant's right to leave into a defect to be eliminated.
Monitoring tells you loss is happening; something still has to reduce it at the source. Retention Outreach Protocol is the field routine that does — the archetype's hands, not its eyes. It lowers the avoidable friction that drives people out (long forms, inconvenient visits, unreimbursed travel) and opens ethical channels to still capture an endpoint from someone drifting away, all under a strict equal-treatment constraint. Its defining move is that it acts on attrition rather than measuring or governing it, and it does so symmetrically: whatever support one arm gets, every arm gets, because retention effort that lands unevenly manufactures exactly the bias monitoring is meant to prevent. It also draws the line the archetype insists on — between withdrawing from treatment and withdrawing from measurement — so that a participant who stops the intervention can still, with fresh consent, contribute an outcome. It never treats the right to withdraw as a defect to engineer away.
Example¶
A longitudinal cohort following older adults for cognitive decline is losing participants who can no longer manage the trip to the study center — mobility, caregiver load, and transport are quietly filtering out precisely the frailest, most informative members. The protocol responds without pressure and without favoritism. A burden audit identifies the avoidable friction: the two-hour battery, the fixed weekday slot, the unreimbursed travel. In answer it offers home visits, flexible scheduling, and travel reimbursement, and it opens a minimal-data channel — a short core-cognitive form a participant can complete by phone if they decline the full visit. Crucially, every one of these supports is offered identically to all participants, not just the ones flagged as wobbling. Many endpoints that would otherwise have been blank are recovered, and the loss that remains is genuine choice rather than avoidable burden.
How it works¶
Its distinguishing discipline is symmetric, consent-bounded action:
- Audit the burden first. Identify which parts of the participation load are avoidable and drive disproportionate loss, then target those.
- Offer proportionate supports. Reminders, scheduling flexibility, reimbursement, and simplified visits — sized to remove friction, not to buy compliance.
- Open an endpoint-recovery channel. A minimal-data pathway plus fresh consent lets a participant who has stopped the intervention still supply the primary outcome; withdrawal from treatment is separated from withdrawal from measurement.
- Apply everything symmetrically. Identical intensity across all arms and sites, so retention effort never becomes a hidden second intervention.
Tuning parameters¶
- Outreach intensity — how persistently to follow up; more recovers more endpoints but approaches pressure.
- Burden-reduction menu — which supports are offered; broader menus help more people but cost more and complicate uniformity.
- Incentive size — how large a reimbursement or token; too small does nothing, too large risks undue inducement.
- Uniformity constraint — the requirement that support be equal across arms; loosening it recovers targeted endpoints but re-introduces differential-retention bias.
- Autonomy limit — how far a withdrawn participant may be re-contacted before pursuit becomes coercion.
When it helps, and when it misleads¶
Its strength is that it shrinks avoidable missingness where it starts and recovers endpoints that analysis would otherwise have to guess at — the cheapest missing datum is the one you never lose. Applied evenly, it improves every downstream mechanism's raw material.
It misleads, and does real harm, when it slides into pressure. Undue inducement[1] — an incentive large enough to override a participant's own judgment about leaving — corrupts the voluntariness the archetype is bound to protect. Its most insidious failure is differential retention intervention: giving one arm stronger follow-up than another, which biases the comparison under the banner of "reducing dropout." The guarding discipline is to pre-specify the protocol, apply it symmetrically across conditions, cap incentives below the inducement line, and honor withdrawal as a right and a possible harm signal rather than a number to drive to zero.
How it implements the components¶
endpoint_recovery_channel— it builds the minimal-data, consent-respecting pathway that still captures an outcome from a unit that has stopped the intervention.participant_burden_audit— it identifies the avoidable participation burden driving attrition so the outreach can remove it rather than merely push against it.
It does not compare who left against who stayed (completer_non_completer_contrast, Completer Balance Table), and it does not set the thresholds that trigger it or adjudicate whether the study should continue (attrition_response_trigger_policy, independent_attrition_review_gate, its nearest twin Data Monitoring Review) — this protocol carries out responses; the review decides them.
Related¶
- Instantiates: Attrition and Dropout Monitoring — the outreach protocol is the archetype's intervention arm, reducing loss and recovering endpoints.
- Consumes: Attrition Dashboard — its differential-loss signals tell the protocol where avoidable burden is concentrated.
- Sibling mechanisms: Participant Flow Diagram · Attrition Dashboard · Withdrawal Reason Survey or Interview · Completer Balance Table · Missing-Data Sensitivity Analysis · Data Monitoring Review
Editorial Notes¶
Form Classification¶
Form family: Protocol, Workflow & Routine
Rationale: Retention Outreach Protocol operates as a repeatable ordered procedure or handoff sequence that coordinates action because it a pre-specified, evenly-applied routine for reducing avoidable burden and recovering endpoints — without turning a participant's right to leave into a defect to be eliminated.
Independent corroboration: The frozen evidence defines Retention Outreach Protocol as 'A pre-specified, evenly-applied routine for reducing avoidable burden and recovering endpoints — without turning a participant's right to leave into a defect to be eliminated', so its operative form is Protocol, Workflow & Routine.
Nearest alternative: Rule, Policy & Commitment — Retention Outreach Protocol includes features of a standing rule, threshold, contractual commitment, or policy constraint governing future conduct, but its defining operation is a repeatable ordered procedure or handoff sequence that coordinates action.
Review outcome: Independent reviewer agreement; medium confidence.
Origin Attribution¶
Primary origin: Statistics & Experimental Design
Origin pattern: Cross-disciplinary synthesis
Present-day reach: Specialized
Rationale: Prospectively specified retention and endpoint-recovery procedures are a core longitudinal-study design concern. Clinical-trial operations supply the concrete outreach routines, while research ethics and participant autonomy constrain those routines so withdrawal is never treated as a defect.
Related originating lineages:
- Law & Governance — law_governance contributes rights, duties, authorization, tenure limits, and accountable procedure to the mechanism’s formative or independently convergent form; that contribution does not displace the primary statistics_experimental_design lineage.
- Medicine & Healthcare — medicine_healthcare contributes clinical follow-up, risk-stratified treatment, consent, and transmission control to the mechanism’s formative or independently convergent form; that contribution does not displace the primary statistics_experimental_design lineage.
- Psychology — psychology contributes social learning, group regulation, trust, behavior rehearsal, and expectation to the mechanism’s formative or independently convergent form; that contribution does not displace the primary statistics_experimental_design lineage.
Review resolution: The blind reviewers disagreed on primary lineage (statistics_experimental_design versus medicine_healthcare); authoritative or primary research supports statistics_experimental_design as the best historical origin. Prospectively specified retention and endpoint-recovery procedures are a core longitudinal-study design concern. Clinical-trial operations supply the concrete outreach routines, while research ethics and participant autonomy constrain those routines so withdrawal is never treated as a defect. The cited SPIRIT 2013 Statement: Defining Standard Protocol Items for Clinical Trials directly supports the defining operation used in that choice. All independently supported contributing domains are retained without an arbitrary cap, while domain_reach=specialized records later applicability separately from provenance.
Encyclopedia synthesis: The exact catalogued form synthesizes established practice rather than reproducing a single standard historical label.
Review outcome: Researched adjudication after independent review; high confidence.
Sources consulted:
Notes¶
It shares the burden component with the Completer Balance Table, but they sit on opposite sides of the loop: the table tabulates burden as a covariate to diagnose whether leavers were more loaded, while this protocol acts on that burden to reduce it and recover the endpoint. Diagnosis versus intervention — the same component read two different ways.
References¶
[1] Undue inducement is an offer of reward large enough to distort a person's voluntary judgment about participating or continuing — a core concern of research-ethics frameworks. It marks the ceiling on retention incentives: support may remove barriers to staying, but it must not become a reason a person cannot afford to leave. withdrawn registry ↩