The LIX (Läsbarhetsindex) is a readability measure commonly used in Nordic countries, particularly for Swedish texts. It was developed by Carl-Hugo Björnsson in 1968 and provides a simple way to estimate the readability of a text.
The LIX score is calculated by adding the average number of words per sentence and the percentage of long words (words with more than 6 characters). The resulting score indicates the text's difficulty level.
Interpreting LIX Scores
- Below 30: Very easy - Children's books
- 30-40: Easy - Fiction for adults
- 40-50: Medium - Newspaper texts
- 50-60: Difficult - Official texts
- Above 60: Very difficult - Scientific texts