Table 1. Individual biases.

Subject	Pointer	Location	t	df	Sig. (1-tailed)	Mean Difference	95% CI of the Difference
							Lower	Upper
1	Dot	4	2.909	6	.014	2.659	.422	4.896
		6	.275	6	.396	.150	−1.188	1.488
		8	3.268	6	.009	1.869	.469	3.268
	Segment	4	2.534	6	.022	1.243	.042	2.444
		6	2.877	6	.014	.289	.043	.535
		8	−.278	6	.395	−.129	−1.268	1.009
2	Dot	4	4.301	6	.003	1.431	.617	2.245
		6	.703	6	.250	.290	−.719	1.299
		8	5.496	6	.001	1.414	.784	2.044
	Segment	4	4.606	6	.002	1.891	.886	2.896
		6	.119	6	.450	.018	−.356	.393
		8	4.960	6	.001	2.332	1.181	3.482
3	Dot	4	1.201	6	.135	.472	−.489	1.433
		6	1.083	6	.160	.309	−.390	1.009
		8	1.866	6	.056	.949	−.295	2.193
	Segment	4	.951	6	.185	.297	−.467	1.061
		6	−.167	6	.435	−.027	−.428	.373
		8	2.509	6	.023	.609	.014	1.203
4	Dot	4	2.414	6	.026	1.382	−.018	2.784
		6	3.094	6	.011	.570	.119	1.022
		8	.130	6	.450	.061	−1.092	1.215
	Segment	4	1.906	6	.053	1.214	−.344	2.772
		6	2.325	6	.030	.086	−.004	.177
		8	1.012	6	.175	.317	−.450	1.085

One-tailed t-test against zero was adopted to assess the statistical significance (p <0.05) of individual biases on the basis of the pointer stimulus and location.