Table 1.

Item statistics Observer Scale

Entry number-items	Count	Measure	Infit MNSQ	Outfit MNSQ
6-Surface area	424	1.39	2.02*	1.94*
4-Thickness	1,628	−.05	0.83	0.74
5-Surface roughness	1,628	−.10	1.01	0.92
2-Pigmentation	1,622	−.11	1.30	1.40
1-Vascularization	1,628	−.56	1.08	1.09
3-Pliability	1,596	−.58	0.69	0.68

MNSQ mean square

* Infit or outfit outside reasonable range of 0.5–1.7