A behavior systems approach contends each instinctive behavior system is independent and serves a specific function or need within the animal.

Behavior Systems Approach

An approach in psychology that studies behavior as part of a functional system, including its adaptive purposes and evolutionary history.

Instinctive Behavior System

Innate, fixed patterns of behavior in animals that are typically automatic in response to specific stimuli.

Specific Function

Branches from the mathematical definition to specify a distinct purpose or role that a particular process, action, or object serves within a broader system.