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Article

In today’s saturated media environment, it is incumbent for designers of health education materials to find more effective and efficient ways of capturing the attention of the public, particularly when the intent is to influence individual behavior change. Tailoring is a message design strategy that has been shown to amplify the effectiveness of health messages at an individual level. It is a data-driven and theory-informed strategy for crafting a message using knowledge of various factors that might influence the individual’s responsiveness to the message, such as their information needs, beliefs, motivations, and health behaviors. It also enhances the persuasiveness of a message by increasing its perceived relevance, drawing attention to the message, and encouraging deeper elaboration of the information. Tailoring content based on known antecedents of the intended behavioral outcomes has been shown to enhance tailoring effectiveness. Compared to generic messages, tailored messages are perceived to be more personally relevant, command greater attention, are recalled more readily, and encourage more positive evaluations of the information overall. Various meta-analyses have demonstrated the effectiveness of tailored interventions promoting a number of health behaviors, such as smoking cessation, healthy diet and nutrition, physical activity, and regular recommended health screenings. Advances in information and communication technologies have led to more sophisticated, multimodal tailored interventions with improved reach, and more powerful expert systems and data analysis models. Web technologies have made it possible to scale the production and delivery of tailored messages to multiple individuals at relatively low cost and to improve access to expert feedback, particularly among hard-to-reach population groups.

Article

The Transtheoretical Model (TTM) is an integrative health behavior change theory that describes the process of how people change their behavior. The central organizing construct in the theory is stages of change, which are five distinct stages of readiness to change behavior, ranging from not ready to change (precontemplation), thinking about change (contemplation), preparing to change (preparation), changing (action), and maintaining the change (maintenance). Movement through the stages may be nonlinear, and cycling and recycling through the stages is viewed as a natural part of the change process. Other model constructs explain what drives individuals forward through the stages of change. Decisional balance involves a weighing of pros and cons of changing behavior, while self-efficacy involves situation-specific confidence that one can change. Increases in pros, deceases in cons, and increases in self-efficacy propel people forward through the stages of change. The processes of change are experiential and behavioral strategies that people use to change their behavior. In early stages of change, people use experiential strategies while they use behaviorally oriented strategies in later stages of change. The TTM holds significant implications for message design. Most notably, messages should be targeted and tailored to stages of change, and where possible, to other model variables as well. Studies indicate that the TTM has been successfully applied to health communication campaigns, and to a larger extent, to computer-tailored interventions to change health behavior. Meta-analyses indicate that scores of computer-tailored interventions have been efficacious, including many based upon the TTM and stages of change. New applications of the model include a focus on novel health behaviors, multiple behavior change, and advancing an understanding of message design in the context of the TTM in combination with other theoretical approaches.