SMOG Totally Explained

Everything about Smog totally explained

SMOG (Simple Measure of Gobbledygook) is a readability formula that estimates the years of education needed to understand a piece of writing. SMOG is widely used, particularly for checking health messages . The precise SMOG formula yields an outstandingly high 0.985 correlation with the grades of readers who had 100% comprehension of test materials.
SMOG was published by G. Harry McLaughlin in 1969(External Link

) as a more accurate and more easily calculated substitute for the Gunning-Fog Index. To make calculating a text’s readability as simple as possible an approximate formula was also given — count the words of 3 or more syllables in 3 10-sentence samples, estimate the count’s square root (from the nearest perfect square), and add 3.

Formula

To calculate SMOG

Count a number of sentences (at least: 10 from the start of a text, 10 from the middle, and 10 from the end).
In those sentences count the polysyllables (words of 3 or more syllables).
Apply this formula:
:: $1.0430 sqrt + 3$

Further Information

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