Using 48 college texts, comparisons were made of Dale-Chall Readability Formula results based on samples taken from various page intervals. Results indicate that for the 48 textbooks examined, samples taken at 20, 30, 40, and 50-page intervals are as reliable as samples taken from 10 page intervals.
References
1.
BurkheadM.B., A Study of the Readability of Selected Introductory Management Textbooks, unpublished D.B.A. dissertation, Texas Tech University, 1975, p. 35.
2.
DaleE.D.GhallJ.S., A Formula for Predicting Readability EDUCATIONAL RESEARCH BULLETIN, 27, 1948, January 21, 11–19.
3.
KlareG.R.The Measurement of Readability. Ames, Iowa: Iowa State University Press, 1963, p. 120.
4.
MartinM.LeeW., Sample Frequency of Application of Dale-Chall Readability Formula, EDUCATIONAL RESEARCH BULLETIN, 40, 1971, September 13, 146–149.
5.
MillerL.R.Predictive Powers of the Dale-Chall and Bormuth Readability Formulas. THE JOURNAL OF BUSINESS COMMUNICATION, II, 1976, Winter, 21–30.
6.
MillerL.HulseB.MacRaeR., Automated Application of the Dale-Chall Multiple Regression Equation to American English Prose, Unpublished Computer Program, Ohio University, 1974.
7.
LeeW.D.BeldenB.R.A Cross-Validation Readability Study of General Psychology Textbook Material and the Dale-Chall Readability Formula. JOURNAL OF EDUCATIONAL RESEARCH, 59, 1966, April, 396–372.
