Reinforcement does not occur evenly. Environments do not support all forms of expression in the same way. Some are sustained, repeated, and made more visible. Others fail to gain traction or gradually recede. This difference reflects the incentives built into the environment.

Incentives shape what persists.

They are not always explicit. They do not appear only as material reward or direct recognition. They can take the form of attention, continued presence, influence, or access. Whatever increases the likelihood that an expression will continue functions as an incentive.

Over time, behavior begins to align with what is supported. This alignment does not require conscious intent. It unfolds through repeated interaction with the environment. What proves effective is repeated. What does not tends to fade. The process is gradual, but its direction is consistent.

As a result, expression narrows. What remains is not necessarily what the individual would express under all conditions, but what is most consistently supported within the environment. The figure comes to reflect this alignment. When incentives are stable, it deepens. When incentives shift, expression adjusts.

In both cases, the underlying process remains the same. What continues is not simply what appears, but what is supported—and what is supported reflects the structure of the environment.

The individual participates in this process, but does not define it. They respond to what is reinforced and, over time, come to reflect the incentives that surround them.