… Mr Leppink declares no conflict of interest. Dr Odlaug has received research funding from
the Trichotillomania Learning Center, has consulted for Lundbeck A/S, and receives royalties …

Importance Excoriation (skin-picking) disorder (SPD) is a disabling, underrecognized condition
in which individuals repeatedly pick at their skin, leading to noticeable tissue damage. To …

Problematic internet use is common, functionally impairing, and in need of further study. Its
relationship with obsessive-compulsive and impulsive disorders is unclear. Our objective was …

… Leppink d , Jon E. Grant d … Leppink assisted in data collection and drafting the
manuscript. … Leppink and Ms. Derbyshire report no financial or other conflicts of interest. Dr. …

ObjectiveAttention-deficit hyperactivity disorder (ADHD) has been associated with various
manifestations of impulsivity in adults, including elevated rates of other impulsive disorders, …

Skin picking disorder (SPD) and trichotillomania (TTM) are common and oftentimes
disabling disorders. 125 Participants with SPD and 152 with TTM undertook clinical and …

Antisocial personality disorder (ASPD) is a relatively common problem, but the neuropsychological
profile of affected individuals has seldom been studied outside of criminal justice …

Background Trichotillomania appears to be a fairly common disorder, with high rates of co-occurring
anxiety disorders. Many individuals with trichotillomania also report that pulling …

Neuropsychological studies of adults with problem gambling indicate impairments across
multiple cognitive domains. Catechol-O-methyltransferase (COMT) plays a unique role in the …

… Test and the Emotional Conflict Task (Leppink et al., 2016, Choi … Leppink drafted the manuscript
and conducted the data analysis… Leppink and Ms. Redden report no conflicts of interest. …