Automated readability index - Wikipedia
Jump to content
Search
Search
Donate
Create account
Log in
Personal tools
Donate
Create account
Log in
Automated readability index
1 language
Русский
Edit links
From Wikipedia, the free encyclopedia
Type of readability test for English texts
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 formula for calculating the automated readability index is given below:
4.71
characters
words
0.5
words
sentences
21.43
{\displaystyle 4.71\left({\frac {\mbox{characters}}{\mbox{words}}}\right)+0.5\left({\frac {\mbox{words}}{\mbox{sentences}}}\right)-21.43}
where characters is the number of letters and numbers, words is the number of spaces, and sentences is the number of sentences, which were counted manually by the typist when the above formula was developed. Non-integer scores are always rounded up to the nearest whole number, so a score of 10.1 or 10.6 would be converted to 11.
Unlike the other indices, the ARI, along with the Coleman–Liau, relies on a factor of characters per word, instead of the usual syllables per word. Although opinion varies on its accuracy as compared to the syllables/word and complex words indices, characters/word is often faster to calculate, as the number of characters is more readily and accurately counted by computer programs than syllables. In fact, this index was designed for real-time monitoring of readability on electric typewriters.[1]
Score<br>Age<br>Grade level
5-6<br>Kindergarten
6-7<br>First grade
7-8<br>Second grade
8-9<br>Third grade
9-10<br>Fourth grade
10-11<br>Fifth grade
11-12<br>Sixth grade
12-13<br>Seventh grade
13-14<br>Eighth grade
10<br>14-15<br>Ninth grade
11<br>15-16<br>Tenth grade
12<br>16-17<br>Eleventh grade
13<br>17-18<br>Twelfth grade
14<br>18-22<br>College student
Notes<br>[edit]
↑ Senter, R.J.; Smith, E.A. (November 1967). "Automated Readability Index" (PDF). Amrl-Tr. Aerospace Medical Research Laboratories (U.s.). Wright-Patterson Air Force Base: 1–14. PMID 5302480. AMRL-TR-6620. Archived from the original on April 8, 2013. Retrieved March 18, 2012.
Readability tests for English<br>Tests and formulas that measure the readability of a text
Automated readability index (1967)
ATOS
Coleman–Liau index (1975)
Dale–Chall readability formula (1948)
Flesch–Kincaid readability tests<br>Flesch reading ease [1975]
Flesch–Kincaid grade level [1975]
FORCAST (1973)
Fry readability formula (1968)
Gunning fog index (1952)
Lexile (1989)
Linsear Write
Raygor readability estimate (1977)
SMOG (1969)
Spache readability formula (1952)
Retrieved from "https://en.wikipedia.org/w/index.php?title=Automated_readability_index&oldid=1310543445"
Category: Readability tests
Hidden categories: Articles with short description<br>Short description is different from Wikidata<br>Use mdy dates from June 2015
Search
Search
Automated readability index
1 language
Add topic