Eyes Test
The analysis of covariance revealed that euthymic patients performed
significantly worse on the Eyes test compared with controls
(F1,39= 4.29; p< 0.05; see fig. 2). The effect
of the covariate (IQ) was not significant (F1,39= 1.43;
p= 0.238). Given that in BD, low IQ in euthymic patients has been
reliably shown [8], removing variance associated with IQ might be
removing meaningful variance associated with the illness-related deficit
under investigation. Therefore, we also conducted these analyses without
IQ as a covariate; results showed that differences between the groups
remained significant (F1,40= 9.06; p= 0.004).