The Developmental Ecological Model is a blueprint for understanding and perhaps changing a person or group's behavior.

In the model, we see that there are many influences upon an individual's decision-making: one's environment, public policies, and social structures all shape thinking. In order to introduce change, others must understand this unique viewpoint. No one can relate to the individual/community of individuals without taking into account these influencers.

With this understanding in place, others can devise strategies that are appropriate for the individual/community. Support can come from federal and state agencies and national organizations familiar with the need.

An example of the Developmental Ecological Model at work is a community's desire to increase seat belt use among its young adult drivers. The community must first understand young drivers' viewpoint and influencers, taking into account their particular social structures. They must collect evidence showing what the need truly is (percentage of actual seat belt users) and then devise a strategy suited for young adults. The result may be an entirely different seat belt intervention from one created for older adults in the same community. Evidence may show that young adults distrust law enforcement in their locale; therefore the planners would be careful to convey seat belt messages through another trusted source.