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Spache Readability Score

Die Spache-Lesbarkeitsformel bewertet Text anhand einer Liste vertrauter Grundschulwörter. Konzipiert für Lesematerial der Klassen K-4.

Nicht für Deutsch ausgelegt

Dieses Tool wurde für Englisch (und einige verwandte Sprachen) kalibriert. Ergebnisse in Deutsch sind wahrscheinlich nicht aussagekräftig.

Wann verwenden

Use Spache for any text aimed at K-4 readers — primary readers, beginning ESL, picture books, learn-to-read content. It's the formula educators most often request for grade 4 and below.

Vergleich

Spache and Dale-Chall both use familiar-words lists, but Spache targets younger readers (K-4) and Dale-Chall targets grades 4+. Use Spache for primary, Dale-Chall for everything else.

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So funktioniert es

The Spache Readability Formula was developed in 1953 specifically for primary-grade text (K-4).

It scores against a list of approximately 1,000 words familiar to elementary readers, combined with sentence length: grade = 0.121 × avg sentence length + 0.082 × % unfamiliar + 0.659.

Best used to evaluate beginning readers, picture books, and ESL primary material. Above grade 4, switch to Dale-Chall.

Formel

Häufige Fragen

When should I use Spache vs. Dale-Chall?

Spache for K-4 reading material. Dale-Chall for grade 4+. They use different familiar-words lists.

Why are some common words flagged unfamiliar?

The Spache list dates to 1953 — modern children's vocabulary may not match. Suffix stripping helps but isn't perfect.

What's a good Spache score?

Grade 1-2 for early readers, 3-4 for primary independent reading. Above grade 4, use a different formula.

Beispiel

Eingabe

"The dog ran fast across the green field."

Ausgabe

Spache grade 1.4 — primary.

All eight words are in the Spache familiar-words list and the sentence is short. Suitable for grade 1–2 readers.

Häufige Fehler

  • Spache is calibrated only up to grade 4; above that, switch to Dale-Chall.
  • The familiar-words list is from 1953 — modern children's vocabulary may not match.
  • Proper nouns are flagged as unfamiliar by default.
  • A few unusual words on a short sample swing the score dramatically.

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