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  1. #1
    Join Date
    Mar 2008

    Question on Fog index?

    The Fog Index is a readability test designed to show how easy or difficult a text is to read. It uses the following formula: Reading Level (Grade) = (Average No. of words in sentences + Percentage of words of three or more syllables) x 0.4
    The resulting number is your Gunning Fog Index.
    The Gunning Fog Index gives the number of years of education that your reader hypothetically needs to understand the paragraph or text. The Gunning Fog Index formula implies that short sentences written in plain English achieve a better score than long sentences written in complicated language.
    For reference, the New York Times has an average Fog Index of 11-12, Time magazine about 11. Typically, technical documentation has a Fog Index between 10 and 15, and professional prose almost never exceeds 18.

    So is it better to have a higher or a lower Fog index ? What is recommended ?

    - Anurag
    Last edited by imanuragjain; 30-Mar-2008 at 21:00.

  2. #2
    Join Date
    Jul 2007

    Re: Question on Fog index?

    It depends on your purpose and audience. For most purposes a lower score is desirable.

  3. #3
    oregeezer's Avatar
    oregeezer is offline Member
    • Member Info
      • Member Type:
      • English Teacher
      • Native Language:
      • American English
      • Home Country:
      • United States
      • Current Location:
      • Thailand
    Join Date
    Nov 2007

    Re: Question on Fog index?

    To be understood you want a LOW fog index - to write for pedagological publications you want a HIGH index. (Makes you sound erudite!)

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