Table 5. Correlation values among perspectives for each observer and for all observers pooled.

	Observer 1			Observer 2			Observer 3			Observers pooled
	r	p	TEE	r	p	TEE	r	p	TEE	r	p	TEE
Coordinates in x-axis
45 deg vs Real coordinates	1.00	0.001	3.671	1.00	0.001	3.595	1.00	0.001	1.979	1.00	0.001	3.043
60 deg vs Real coordinates	1.00	0.001	1.637	1.00	0.001	1.751	1.00	0.001	1.608	1.00	0.001	1.626
75 deg vs Real coordinates	1.00	0.001	2.25	1.00	0.001	2.020	1.00	0.001	2.242	1.00	0.001	2.157
90 deg vs Real coordinates	1.00	0.001	1.182	1.00	0.001	1.145	1.00	0.001	1.083	1.00	0.001	1.042
Coordinates in y-axis
45 deg vs Real coordinates	1.00	0.001	1.026	1.00	0.001	0.998	1.00	0.001	0.697	1.00	0.001	0.847
60 deg vs Real coordinates	1.00	0.001	0.948	1.00	0.001	0.778	1.00	0.001	0.764	1.00	0.001	0.741
75 deg vs Real coordinates	1.00	0.001	0.777	1.00	0.001	0.675	1.00	0.001	0.749	1.00	0.001	0.664
90 deg vs Real coordinates	1.00	0.001	0.873	1.00	0.001	0.736	1.00	0.001	0.576	1.00	0.001	0.585

TEE: typical error of the estimate