Table 4.

Means and standard errors for viewing durations (ms), sensitivity (given by the slope relating response distance to target distance), bias (given by the percent means signed error across distances), and precision (given by the standard errors of the estimates).

	Viewing Duration	Sensitivity	Bias	Precision
Multi Block First
YoungerSingle	29.2 (2.0)	0.95 (0.12)	−23.7 (5.1)	0.50 (0.05)
YoungerMulti	39.8 (4.6)	0.85 (0.07)	−13.6 (4.6)	0.55 (0.07)
OlderSingle	49.6 (4.5)	0.69 (0.09)	−27.7 (4.9)	0.27 (0.03)
OlderMulti	80.4 (12.0)	0.81 (0.09)	−17.9 (7.1)	0.46 (0.08)
Single Block First
YoungerSingle	27.4 (1.9)	0.82 (0.12)	−23.5 (5.7)	0.45 (0.05)
YoungerMulti	29.5 (2.1)	0.94 (0.08)	−19.4 (5.8)	0.42 (0.06)
OlderSingle	61.9 (5.2)	0.46 (0.10)	−42.4 (6.7)	0.54 (0.13)
OlderMulti	68.3 (7.4)	0.79 (0.10)	−29.8 (8.1)	0.52 (0.07)