Spache readability formula
This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (January 2017) (Learn how and when to remove this template message)
The Spache readability formula is a readability test for writing in English, designed by George Spache. It works best on texts that are for children up to fourth grade. For older children, the Dale–Chall readability formula is more appropriate.
It was introduced in 1953 in Spache's "A new readability formula for primary-grade reading materials," (The Elementary School Journal, 53, 410–413), and has subsequently been revised.
The method compares words in a text to a set list of everyday words. The number of words per sentence and the percentage of unfamiliar words determine the reading age.
The original formula was:
The revised formula is:
- Spache, G. (1953). "A New Readability Formula for Primary-Grade Reading Materials". The Elementary School Journal. 53 (7): 410–13. doi:10.1086/458513. JSTOR 998915.
- Clarence R. Stone. "Measuring Difficulty of Primary Reading Material: A Constructive Criticism of Spache's Measure." The Elementary School Journal, Vol. 57, No. 1 (Oct. 1956), pp. 36–41