Table 1. Endorsement rates for groups participating in Stage 3.

Endorsement rate is the fraction of images to which a participant responded “Yes, there is a known object”. Group (N): mean (standard deviation).

Group	Endorsement rate
Control (28)	0.37 (0.15)
Schizophrenia patients (27)	0.39 (0.16)
Bipolar patients (24)	0.51 (0.21)
Relatives of schizophrenia patients (21)	0.44 (0.22)
Relatives of bipolar patients (20)	0.42 (0.16)