The Depression Center  
 
 

Depression Glossary

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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 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.

Operant Conditioning: a form of learning by which a response is rewarded to increase the likelihood that is will happen again.

Oral Contraceptives: used for birth control.

OTC: over-the-counter (non-prescription) medication.

Outcome Research: used to describe studies of the effectiveness of treatments.

Oxytocin: a hormone with a number of functions including muscle contraction and nerve sensitivity.

Obsessive Compulsive Disorder (OCD): an anxiety disorder characterized by obsessive and compulsive symptoms.

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

OCD: obsessive compulsive disorder

Overt Behavior: behavior that can be observed by another person and can therefore be measured.