Cognitive therapist Aaron Beck theorized that a "pessimistic explanatory style" is the cognitive root of this disorder.  
Unlike dysthymia, it is characterized by episodes with more severe symptoms, and diagnosis can be made after only a month instead of two years. Cognitive therapist Aaron Beck theorized that a "pessimistic explanatory style" is the cognitive root of this disorder.  It is sometimes accompanied by psychotic features but more normal symptoms can include insomnia, weight loss or gain, and anhedonia.  For 10 points, name this mood disorder that often causes lethargy and suicidal ideation, but in many cases can be relieved by SSRI's like Prozac.
Unlike dysthymia, it is characterized by episodes with more severe symptoms, and diagnosis can be made after only a month instead of two years.
{Major Depressive Disorder} (accept {Depression})