Nightmares can cause great suffering as they disturb sleep, affect
daily functioning and overall well-being. They are associated with
psychopathology like anxiety disorders, more specifically posttraumatic
stress disorder (PTSD), psychosis, personality pathology, suicide
risk, and substance abuse [1, 2] . Two to five percent of the general
adult population suffers from one or more nightmares a week
[3, 4] . One study of psychiatric patients with more severe psychopathology
showed a prevalence rate of 39.8% of ‘bad dreams that disturbed