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Flesch index

Flesch index The Flesch index is a readability measure used to estimate how structurally difficult a text is by using word and sentence length.

The Flesch index is a readability measure used to estimate how structurally difficult a text is by using word and sentence length. In this context, it classifies language complexity on a scale from hard to very simple.

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Sources

Drafting source: Thiem Simon-Konstantin; Küppers Lucas; Aretz Benjamin; Bozorgmehr Arezoo; Karimzadeh Arian; Leupold Frauke; Weltermann Birgitta. Language complexity of patient-physician chat communication on hypertension control: results of the cluster-randomised PIA study. 2025; DOI 10.1186/s12916-025-04006-0; article XML SHA-256 21589d9768045cc73262c46f3f81852f9672fec24d63030cd135b8073ea0a9b3. “Language complexity of patient-physician chat communication on hypertension control: results of the cluster-randomised PIA study” (10.1186/s12916-025-04006-0).
CC-BY-4.0 · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: 21589d9768045cc73262c46f3f81852f9672fec24d63030cd135b8073ea0a9b3

These citations identify the drafting sources. 2/2 independent reader passes against the pinned source packet. The drafter does not count as a reader. Source institutions do not endorse this dictionary.

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “Flesch index.” Development preview.

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