Table 2.

Expert authority coefficient and Kendall’s W coefficient of concordance.

Round	Rated items (k)	df = k − 1	Mean Ca	Mean Cs	Mean Cr	Kendall’s W	χ2	p-value
First round	64	63	0.842	0.865	0.854	0.292	367.920	<0.01
Second round	53	52	0.863	0.876	0.870	0.353	367.120	<0.01
Third round	36	35	0.875	0.879	0.877	0.367	256.900	<0.01