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These readability tests are used extensively in the field of education. The "Flesch–Kincaid Grade Level Formula" presents a score as a U.S. grade level, making it easier for teachers, parents, librarians, and others to judge the readability level of various books and texts. It can also mean the number of years of education generally required ...
Extract a 100-word passage from the selection. [2] If the material is long, take a subsample from the beginning, middle, and end. Count the number of sentences in each passage. Count a half sentence as 0.5. Count the number of words in each passage containing six or more letters. Find the point on the Raygor estimate graph.
The Coleman–Liau index is a readability test designed by Meri Coleman and T. L. Liau to gauge the understandability of a text. Like the Flesch–Kincaid Grade Level, Gunning fog index, SMOG index, and Automated Readability Index, its output approximates the U.S. grade level thought necessary to comprehend the text.
On the other hand, short words can still be difficult if they are not often used. The frequency of word usage also affects the readability of a text. [3] Additionally, the fog index is primarily applicable to English and may not accurately reflect readability in other languages. [4] Until the 1980s, the fog index was calculated differently. [5]
The automated readability index (ARI) is a readability test for English texts, designed to gauge the understandability of a text. Like the Flesch–Kincaid grade level, Gunning fog index, SMOG index, Fry readability formula, and Coleman–Liau index, it produces an approximate representation of the US grade level needed to comprehend the text.
The standard Linsear Write metric Lw runs on a 100-word sample: [3] For each "easy word", defined as words with 2 syllables or less, add 1 point. For each "hard word", defined as words with 3 syllables or more, add 3 points. Divide the points by the number of sentences in the 100-word sample. Adjust the provisional result r: If r > 20, Lw = r / 2.
The Dale–Chall readability formula is a readability test that provides a numeric gauge of the comprehension difficulty that readers come upon when reading a text. It uses a list of 3000 words that groups of fourth-grade American students could reliably understand, considering any word not on that list to be difficult.
LIX (abbreviation of Swedish läsbarhetsindex, "readibility index") is a readability measure indicating the difficulty of reading a text [1] developed by Swedish scholar Carl-Hugo Björnsson. It is defined as a sum of two numbers: the average sentence length and the percentage of words of more than six letters.