Test-Retest and Inter-Analyst Reliability of the Automated Readability Index, Flesch Reading Ease Score, and the Fog Count
Georgelle Thomas, R Hartley, J. Peter Kincaid · Journal of Reading Behavior · 1975
Using six analysts, test-retest and inter-analyst reliabilities were determined for the Automated Readability Index (ARI), the Flesch Reading Ease Score, and the Fog Count. All coefficients, with the exception of one Flesch measure, were above .94. Analysis of variance applied to measured working times indicated that the Flesch takes significantly longer to use than the ARI and Fog.