Table 1.

Mean (+SE) task performance during fMRI acquisition.

	TTC allocentric	TTC egocentric	Colour allocentric	Colour egocentric
Accuracy (% correct)	75.9 (3.0)	68.5 (1.6)	77.0 (2.1)	76.9 (1.4)
Reaction time (ms)	617.49 (24.68)	614.73 (22.74)	604.01 (20.35)	599.59 (21.29)
d′	1.62 (0.18)	1.40 (0.11)	1.65 (0.15)	1.68 (0.11)
β	2.27 (0.37)	0.30 (0.04)	1.11 (0.22)	0.76 (0.16)

Higher d′ scores reflect more accurate performance. A β score of 1 reflects a lack of response bias, lower β scores reflect a more liberal response bias (more likely to say there was a collision/colour-match) while higher β scores reflect a more conservative response bias (more likely to say there was no collision/colour-match).