Table 4.

Linear interpolation slopes for average SSS values vs cluster numbers

		ANCOVA
		Linear regression slope coefficient comparison
Comparison	Items	Phase 1	Phase 2	Test results
Phase 1 vs Phase 2	Experts	Slope = 3.940	Slope = 4.068	F = 0.90
		R2 = 0.831	R2 = 0.835	P = 0.533
		sslope = 0.141	sslope = 0.149
	Core participants	Slope = 3.756	Slope = 4.019	F = 3.64
		R2 = 0.836	R2 = 0.830	P = 0.057
		sslope = 0.087	sslope = 0.110
Comparison	Items	Experts	Core participants	Test results
Experts vs core participants	Phase 1	Slope = 3.940	Slope = 3.756	F = 1.22
		R2 = 0.831	R2 = 0.836	P = 0.270
		sslope = 0.141	sslope = 0.087
	Phase 2	Slope = 4.068	Slope = 4.019	F = 0.06
		R2 = 0.835	R2 = 0.830	P = 0.801
		sslope = 0.149	sslope = 0.110