LIX ( Swedish: Läsbarhetsindex ) is a readability index developed by the Swedish scientist and educator Carl-Hugo Björnsson in 1968 to determine the reader’s difficulty in reading text. The higher the LIX index value, the more complex the text. The LIX index is often used in the Scandinavian countries, for example, in the libraries of Denmark it is used as a parameter for finding books of a certain complexity.
Formula
The formula for calculating the LIX index [1] :
where
- - the number of words in the text,
- - the number of sentences in the text,
- - the number of words is longer than 6 letters.
An approximate interpretation of the index [2] :
| Lix | Explanation |
|---|---|
| <30 | Very simple texts, children's literature |
| 30-40 | Simple texts, fiction, newspaper articles |
| 40-50 | Medium texts, journal articles |
| 50-60 | Complicated texts, non-fiction articles, professional literature, official texts |
| > 60 | Very complex texts written in clerical language, laws |
See also
- Auto Readability Index
Notes
- ↑ Lixtal og lix (Læsbarhedsindex) . - 2014. Archived on March 17, 2013.
- ↑ Läsbarhetsindex (LIX) . - 2015. Archived on January 14, 2016.
Literature
- Björnsson, CH (1968). Läsbarhet . Stockholm: Liber.
- Björnsson, CH (1971). Læsbarhed . København: Gad.
Links
- Online LIX Index Calculation Tool (Swedish)