DSM-5 Criteria for Major Depressive Disorder

Adapted Guidelines for Single-Tweet Analysis: Melancholy Group

Depressed mood most of the day, nearly every day.

Tweet expresses sad, hopeless, or pessimistic sentiment.

Markedly diminished interest or pleasure in all, or almost all, activities most of the day, nearly every day.

Tweet expresses lack of interest in activities.

Significant weight loss when not dieting or weight gain, or decrease or increase in appetite nearly every day.

Cannot interpret in a tweet.

A slowing down of thought and a reduction of physical movement (observable by others, not merely subjective feelings of restlessness or being slowed down).

Cannot interpret in a tweet.

Fatigue or loss of energy nearly every day.

Tweet expresses fatigue.

Feelings of worthlessness or excessive or inappropriate guilt nearly every day.

Tweet expresses worthless/guilty sentiment.

Diminished ability to think or concentrate, or indecisiveness, nearly every day.

Tweet expresses diminished ability to think/concentrate or indecisive sentiments

Recurrent thoughts of death, recurrent suicidal ideation without a specific plan, or a suicide attempt or a specific plan for committing suicide.

Tweet expresses suicidal intention or outlines a specific plan for committing suicide.