What mechanism allows systems to correct themselves and restore equilibrium?

The mechanism that allows systems to correct themselves and restore equilibrium is negative feedback. In systems theory, negative feedback refers to processes that counteract deviations from a set point or desired state. When a system experiences a change, negative feedback works to diminish or reverse that change, helping to maintain stability and homeostasis. For example, in the context of therapy or family dynamics, when a family member's behavior shifts and creates tension, negative feedback mechanisms may involve communication or adjustments that help restore balance within the family unit.

In contrast, positive feedback amplifies changes rather than correcting them, which can lead to escalation or instability instead of equilibrium. Equifinality refers to the concept that a system can reach the same endpoints from different initial conditions, and does not primarily focus on mechanisms of self-correction. The double bind concept involves a situation where an individual receives conflicting messages, which can create confusion and stress rather than promote equilibrium. Thus, negative feedback is the key mechanism that supports systems in achieving and maintaining a balanced state.