Post on 13-Jan-2016
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UNIT 4:
Readability Index
Measurement
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What is Readability?
The feature of plain language that makes it easy to read Or
Describes the ease with which a document can be read.
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How to Measure Readability?
Mathematical formulas were designed to assess the suitability of books for students at particular grade levels or ages.
Formulas provide an objective measure of text difficulty that can be reported as a level.
It is interpreted to mean that a reader must be reading at that level in order to understand the text.
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The readability formulas are 80 percent accurate.
They give a good rough estimate of the difficulty of a text.
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Features of the Reader thataffect Readability
Readers:
1. Prior Knowledge
2. Reading skill (literacy)
3. Interest
4. Motivation
Text:
1.Content
2.Style
3.Design
4.Organization5
Benefits of Readability
Greater readability increases:
Comprehension (understanding)
Retention (memory)
Reading Speed
Persistence (reading more of the text)
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Readability Formula
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1. Rudolf Flesch
his Reading Ease Readability formula.
RE = 206.835 – (1.015 x ASL) – (84.6 x ASW)
RE = Readability Ease
ASL = Average Sentence Length (i.e., the number of words divided by the number of sentences)
ASW = Average number of syllables per word (i.e., the number of syllables divided by the number of words)
http://www.readabilityformulas.com/flesch-reading-ease-readability-formula.php
Scores:
90-100 : Very Easy 80-89 : Easy 70-79 : Fairly Easy 60-69 : Standard 50-59 : Fairly Difficult 30-49 : Difficult 0-29 : Very Difficult /Confusing
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Flesch Reading Ease score:
22.8 (text scale)Flesch Reading Ease scored your text: very
difficult to read.
Reading Level: very difficult to read.
Reader's Age: College graduate
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2. Spache Readability FormulaThe Spache Formula considers “unfamiliar words” as words that 3rd grade and below.
Spache Readability Index/Grade Level = (0.141 X ASL) + (0.086 X PDW) +0.839
where,
ASL = Average Sentence Length
PDW = Percentage of Difficult Words
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http://www.readabilityformulas.com/spache-readability-formula.php
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ADJUSTED SCORE GRADE LEVEL
4.9 and Below Grade 4 and Below
5.0 to 5.9 Grades 5 - 6
6.0 to 6.9 Grades 7 - 8
7.0 to 7.9 Grades 9 - 10
8.0 to 8.9 Grades 11 - 12
9.0 to 9.9 Grades 13 - 15 (College)
10 and AboveGrades 16 and Above (College Graduate)
Spache Readability Index: 15.6
Grade level: College Graduate
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