Intervene

W09 · 5 h 30 min

Evidence-rich content architecture

Essential question

How can structure improve use without distorting facts?

What you should be able to do

  1. Redesign content for inspectable evidence.
  2. Hold factual message constant across variants.
  3. Distinguish technical eligibility from causal visibility.
PrerequisitesW02 claim ledger.W08 pre-analysis plan.
Builds on

W02 claim ledger. · W08 pre-analysis plan.

Investigates

How can structure improve use without distorting facts?

Feeds

L05 controlled intervention I.

Arrive with a prepared artifact

Reading route
Core PAPER-12/PAPER-21/PAPER-23; Extend PAPER-08/PAPER-09; PAPER-28 audit-only; platform route PLAT-02/PLAT-03/PLAT-13.
Viewing route
Open the complete text-first lecture packageSix-minute intervention-card and factual-equivalence demo. The current equivalent is notes, slide script, worked case, and no-video transcript; no recording is claimed.
Readiness check
Mark claims, evidence, definitions, methods, and limitations on a supplied page.
Bring
One proposed factor with a mechanism hypothesis and falsification condition.

Concepts, assumptions, and boundary

Design for evidence retrieval by humans and systems

Useful evidence pages state the answer and scope early, break compound assertions into inspectable claims, define terms, expose methods and dates, use tables for comparable values, and preserve limitations and change history. These practices improve human verification and can support machine parsing, but they are not a guaranteed ranking recipe. Structured data, headings, metadata, and semantic markup must remain consistent with visible factual content rather than creating a second, more promotional claim layer.

Controlled intervention preserves meaning

A test changes one structural or evidentiary factor while locking the factual claims, entity identity, publication state, and control/treatment timing. The intervention card states the hypothesized pipeline stage, expected direction, confounds, validation tests, and rollback. Accessibility, validity, and factual equivalence are release conditions, not secondary polish. If multiple changes are necessary, a factorial or sequential design must acknowledge the new estimand.

Inspect the mechanism or evidence structure

ReconstructionEvidence-page anatomy—not a ranking recipe
Evidence-page anatomy—not a ranking recipeA single-column evidence page is annotated with content roles. Every label explains a verification function; a prominent note states that the reconstruction does not promise improved ranking or citation.Answer + scoperole 1Atomic claimsrole 2Primary evidencerole 3Methodrole 4Limitsrole 5Historyrole 6
Figure design. An editorial page reconstruction labels answer, scope, claim blocks, primary evidence, method, limitations, metadata, and revision history. Evidence architecture supports inspection; it is not a ranking recipe.
Long description

A single-column evidence page is annotated with content roles. Every label explains a verification function; a prominent note states that the reconstruction does not promise improved ranking or citation.

One action, one feedback state

Action

Compare control and treatment pages and identify the single changed factor.

Feedback

Feedback names preserved facts, accidental co-interventions, accessibility regressions, and the hypothesized stage.

Accessible alternative

A line-by-line diff and equivalence checklist provide the same comparison.

Open the intervention-diff explorer

Produce a reviewable intermediate file

Task
Create control and treatment pages in the local mirror environment.
Inputs
Mirror page, intervention schema, equivalence checklist, HTML/accessibility tests.
Timebox
75 minutes
Intermediate file
control.html, treatment.html, intervention-card.yaml
Stop condition
Rollback if factual equivalence, accessibility, authorization, or single-factor isolation fails.

Why each controlled source is here

Complete, retrieve, and revise

Checkpoint
L05 controlled intervention I.
Reflection
Explain why a technically cleaner page may still show no visibility effect.
Revision
Resolve every diff not named in the intervention card.
Low-compute route
Edit and validate local static HTML; no hosting or live platform experiment is required.

Five retrieval questions

01What does factual equivalence protect?

It helps isolate structural/evidentiary changes from changes in the underlying message or claims.

02Why is schema not a visibility guarantee?

It can affect machine-readable eligibility on supported surfaces, but retrieval, selection, generation, and attribution remain separate.

03When does a one-factor design fail?

When uncontrolled text, claims, links, timing, accessibility, or technical behavior also change.

04What is the evidence boundary for W09?

PAPER-28’s headline is retained only as an audit case; no reported percentage is a course finding without full claim-level validation.

05What must you submit or revise after this week?

L05 controlled intervention I. Resolve every diff not named in the intervention card.

Continue in the practice package