🧠ap psychology review

Severe Depression

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated August 2025

Definition

Severe depression is a mental health disorder characterized by persistent feelings of sadness, loss of interest or pleasure in activities, changes in appetite or sleep patterns, low energy levels, difficulty concentrating or making decisions, feelings of worthlessness or guilt, and sometimes thoughts of self-harm or suicide.

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