In order to develop an effective stress management program, it is first necessary to identify the factors that are central to a person controlling his/her stress and to identify the intervention methods which effectively target these factors. Lazarus and Folkman's interpretation of stress focuses on the transaction between people and their external environment (known as the Transactional Model). The model contends that stress may not be a stressors if the person does not perceive the stressors as a threat but rather as positive or even challenging. Also, if the person possesses or can use adequate coping skills, then stress may not actually be a result or develop because of the stressors. The model proposes that people can be taught to manage their stress and cope with their stressors. They may learn to change their perspective of the stressors and provide them with the ability and confidence to improve their lives and handle all of the types of stressors.