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Instability

Written by the Fiveable Content Team โ€ข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated September 2025

Definition

Instability refers to a lack of consistency or predictability in moods, behavior, self-image, and functioning. It is often associated with personality disorders characterized by frequent and intense shifts in these areas.

Instability Definition - AP Psychology Key Term | Fiveable