Assessment reactivity refers to the finding that the action of having a behavior queried, monitored, or become a focus of attention during a research study independently can affect the expression of that behavior regardless of other interventions or manipulations used in the study. This article reviews recent efforts to empirically evaluate the independent impact of assessment reactivity on reducing alcohol use and problems in addition to examining how assessment reactivity may act to reduce alcohol use and related problems. The potential of taking advantage of assessment reactivity in alcohol use disorder treatment is discussed.KEYWORDS Assessment reactivity, alcohol use disorder treatment, alcohol use disorder assessment, motivational interviewing, brief interventionIn investigating the impact of an intervention on alcohol use patterns or alcohol-related problems, an essential element of the research design is an assessment determining the level of use and problems prior to the intervention and comparison of the same or similar measurements after the intervention. It is through statistical and effect size comparison of the degree of change in alcohol use patterns and related problems following intervention that we attempt to objectively judge and compare the utility of our treatments.Numerous types of assessments are used in research depending on the focus of the research question. For example, the Timeline Follow-Back