Table 2.

Average readability score and users’ ratings.

Genre	Average score or rating
	FKGLa	SMOGb	GFIc	AMTd user rating
Wiki	14.75	11.07	12.33	4.41
Med	9.87	8.74	8.16	5.35
Differencee (%)	−33.09	−21.03	−33.76	21.31
P value	<.001	<.001	<.001	.002

^aFKGL: Flesch-Kincaid Grade Level.

^bSMOG: Simple Measure of Gobbledygook.

^cGFI: Gunning-Fog Index.

^dAMT: Amazon Mechanical Turk.

^eAll differences in scores between the wiki and med genres were statistically significant at level P=.01 (Mann-Whitney U test). The second to last row shows that the percentage med score was higher than the percentage wiki score.