This dataset contains the data of N=35 controls and N=32 people with bulimia nervosa. It contains the data of their answers to a survey asking questions about their eating disordered thoughts and behaviours (EDE-Q); their use of suppression and reappraisal (ERQ); difficulties with emotion dysregulations (DERS), alexithymia (TAS); emotional reactivity (ERS); depression stress and anxiety (DASS); empathy (IRI). It also contains their LPP (Late Positive Potential) data for the electroencephalography (EEG) task, for the first tiem they viewed the picture (to look at emotion processing) and the second time (to look at emotion regulation).