This article illustrates the various traditional readability formulas available to estimate readability score. Natural language processing sometimes requires analyzing words and sentences to determine the complexity of the text. Readability metrics — these are, as a rule, the grading levels on specific scales that rate the text in relation to the complexity of that particular text. It helps the author to improve the text to make it understandable for a wider audience, which makes the content attractive.
Various methods available for determining the Readabilty / Formaulae score: —
1) Dale - Challa formula
2) Gunning fog formula
3) Graph readability fry
4) McLaughlin SMOG formula
5) FORECAST formula
6) Newspaper readability and readability
7) Flash Points
Read about more accessible readability formulas here .
The implementation of the readability formulas is shown below.
Dale Chall’s formula
To apply the formula:
Select multiple 100 word swatches throughout the text.
Calculate the average length of a sentence in words (divide the number of words by the number of sentences).
Calculate the percentage of words NOT in Dale-Chall’s 3000 simple word list.
Calculate this equation
Raw score = 0.1579 * (PDW) + 0.0496 * (ASL) + 3.6365 Here, PDW = Percentage of difficult words not on the Dale – Chall word list. ASL = Average sentence length
Gunning Mist Formula
Grade level = 0.4 * ((average sentence length) + (percentage of Hard Words)) Here, Hard Words = words with more than two syllables.
SMOG grading = 3 + √ (polysyllable count). Here, polysyllable count = number of words of more than two syllables in a sample of 30 sentences.
Reading Ease score = 206.835 - (1.015 × ASL) - (84.6 × ASW) Here, ASL = average sentence length (number of words divided by number of sentences) ASW = average word length in syllables (number of syllables divided by number of words)
Benefits of formula readability:
1 Readability formulas measure the level of readership must be in order to read a given text. Thus, the author of the text receives much-needed information to reach his target audience.
2. Know in advance if the target audience can understand your content.
3 . Easy to use.
4. Readable text attracts more audience.
Disadvantages of readability formulas:
1. Due to With many readability formulas, there is an increasing likelihood of getting wide variations in the results of the same text.
2. Applies math to literature, which is not always a good idea.
3. Can’t measure complexity words or phrases to determine exactly where to fix them.