Psychological Disorders

What exactly is a psychological disorder? How is a psychological disorder diagnosed? Learn more about how clinicians define and classify mental disorders and discover how many people are impacted by such disorders every year.

As the days grow shorter and darker in fall and winter, many people begin to experience symptoms of Seasonal Affective Disorder, also known as SAD. Learn more about how to cope with seasonal affective disorder.

Generalized anxiety disorder is characterized by excessive worry and anxiety lasting six months or longer. Learn more about the prevalence, symptoms, and treatments of generalized anxiety disorder.

Antisocial personality disorder is characterized by a lack of empathy, impulsive behavior, and problems with authority. Learn more about the symptoms and treatments for antisocial personality disorder.

Seasonal Affective Disorder (SAD) is marked by bouts of depression that occur on a seasonal basis. Sufferers often experience depression, irritability, and weight gain. Learn more about the symptoms and treatments for seasonal affective disorder (SAD).

Agoraphobia is an anxiety disorder marked by fear and avoidance of public places. Find out more about symptoms and treatments for this agoraphobia.

Borderline personality disorder creates a maladaptive pattern of thoughts, feelings, and behaviors that can cause serious detriments to relationships and other life areas. Learn more about the symptoms and treatment of personality disorders

Histrionic personality disorders create a maladaptive pattern of thoughts, feelings, and behaviors that can cause serious detriments to relationships and other life areas. Learn more about the symptoms and treatment of histrionic personality disorder.

An estimated one percent of American adults have narcissistic personality disorder. Learn more about the history of narcissism in psychology, how it came to be recognized as a disorder and what the future holds for this diagnosis.