“…These studies showed that individuals with RBD experienced greater difficulty in processing emotional faces than individuals with LBD and normal controls [6,7,25,26,30,35,39,41,43,44,48,54,63,64,65,66,67,68,69,70]. In contrast, most studies found no differences between RBD and LBD patients in the processing of emotional faces [27,31,45,60], and one study found that LBD patients were more impaired than RBD patients [71]. In the latter study, there were findings which provided support for the valence hypothesis.…”