According to behavior modification principles, what must be measured to change a behavior?

Measuring observable behaviors is essential in behavior modification because this approach is grounded in empirical evidence. When trying to change a behavior, the focus is on what can be directly seen and recorded, allowing for objective assessment of progress or regression. Observable behaviors provide a clear baseline from which changes can be tracked over time. This allows practitioners to implement specific interventions and measure their effectiveness based on tangible outcomes.

In contrast, while thought processes, emotional reactions, and biological responses can influence behaviors, they are often subjective and more challenging to quantify objectively. Thus, they do not provide the same clarity or accountability in tracking behavioral change. Focusing on observable behaviors ensures that interventions can be systematically applied and adjusted based on what is directly measured. This empirical basis is a cornerstone of behavior modification strategies, making it the most appropriate choice in the context of altering behaviors.