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Text Stats

The Text Stats feature calculates a variety of statistics for each book in the Search Inside!™ program. The Readability calculations estimate how easy it is to read and understand the text of a book.

  • The Fog Index was developed by Robert Gunning. It indicates the number of years of formal education required to read and understand a passage of text.
  • The Flesch Index, developed in 1940 by Dr. Rudolph Flesch, is another indicator of reading ease. The score returned is based on a 100 point scale, with 100 being easiest to read. Scores between 90 and 100 are appropriate for 5th and 6th graders, while a college degree is considered necessary to understand text with a score between 0 and 30.
  • The Flesch-Kincaid Index is a refinement to the Flesch Index that tries to relate the score to a U.S. grade level. For example, text with a Flesch-Kincaid score of 10.1 would be considered suitable for someone with a 10th grade or higher reading level.

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