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Obsessions
Persistent and recurrent thoughts, impulses, or images, that are experienced as intrusive and disturbing but are difficult to suppress or control.
Obsessive
Used to describe persistent and recurrent unwanted thoughts, images, or impulses.
Obsessive Compulsive (OC) Spectrum Disorders
A diverse group of problems/conditions that have been considered to perhaps be related to OCD including compulsive gambling, trichotillomania, body dysmorphic disorder (BDD), hypochondriasis, somatization disorder, Tourette Syndrome (TS), Autism, Asberg�s Syndrome, kleptomania, eating disorders including anorexia nervosa and bulimia nervosa, and various disorders of impulse control.
Obsessive Compulsive Disorder (OCD)
An anxiety disorder characterized by obsessive and compulsive symptoms.
Obsessive Compulsive Personality
A personality style characterized by concern with maintaining order, control and following the rules.
Obsessive Disorder
A disorder characterized by persistent and recurrent unwanted thoughts, images, or impulses but few or no compulsions.
OCD
Obsessive compulsive disorder.
Operant Conditioning
A form of learning by which a response is rewarded to increase the likelihood that is will happen again.
OTC
Over-the-counter (non-prescription) medication.
Outcome Research
Used to describe studies of the effectiveness of treatments.
Overt Behavior
Behavior that can be observed by another person and can therefore be measured.
Oxytocin
A hormone with a number of functions including muscle contraction and nerve sensitivity.
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