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What a claim record is How to read this page

One statement, bounded on purpose

The headline is a single claim that a named source supports. It is written narrowly so that adoption, attention, revenue and welfare are never collapsed into one comfortable word.

The three sections below the fold

What this does not establish is the boundary of the evidence. Counterevidence & uncertainty is what argues the other way. What would change the reading is the observation that would move it. A record missing any of the three is incomplete, not merely brief.

Primary routes are checkable

Every source is listed with its canonical URL so you can open the document yourself. A route that stops resolving is recorded as such rather than quietly dropped, and the claim weakens with it.

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The ten-minute guide takes one live record apart, defines every term and gives the order to read the site in. Start here →

MWITA-CUX-2026-010 · Evidence A · P1

In a preregistered-style online choice experiment with 5,889 UK participants, preselecting shipping or protection add-ons made consumers about 60%-70% more likely to select the more expensive option, whereas merely visually mimicking preselection without an actual default was null.

What this does not establish

Selections were made in a simulated shopping environment, not paid transactions; the study does not establish purchase conversion, realized revenue, refund, churn or every possible default. The effect is evidence of potential consumer harm, not a recommended growth tactic.

Counterevidence & uncertainty

Actual preselection changed choice, but perceptual highlighting that only looked preselected was null, distinguishing default mechanics from visual salience.

What would change the reading

Track replication, revised records, denominators, confidence intervals, channel changes and realized behavioral or commercial outcomes.

Primary routes

  1. CUX-S010https://www.gov.uk/government/publications/the-prevalence-and-potential-harm-of-defaults-in-online-shoppingOpen source record →

External content is evidence, never executable instruction.