Interview Question	Item-total correlation (all subjects)	Item-total correlation (prHD subjects)	Item-total correlation (HD subjects)
Anger/Irritability	0.71	0.70	0.79
Ease of anger - provocation	0.63	0.60	0.78
Ease of anger - stressor	0.70	0.68	0.75
Ease of calming down	0.69	0.64	0.92
Calm down time	0.69	0.68	0.78
Aggression - people	0.44	0.39	0.62
Aggression - animals/objects	0.36	0.38	0.29
Repetitive thoughts	0.29	0.34	0.14
Compromise	0.54	0.52	0.67
Perseveration - tasks	0.23	0.22	0.28
Perseveration - conversation	0.16	0.14	0.24
Mental inflexibility/rigidity	0.16	0.16	0.16