Strengths and Limitations
This study has several important strengths and limitations. To the best of our knowledge, it is the first study to examine the potential role of MI in combat-related TR-PTSD and whether 3MDR could be an acceptable treatment modality for MI in MMs and veterans. This knowledge may be beneficial for the fields of MI and TR-PTSD, as the understanding may provide new insights into these two emerging and perplexing constructs. Second, as a mixed-method study, it offered a holistic perspective on the participant experience and sought to draw deeply on the qualitative aspects to further illuminate the quantitative data. Third, this study used MI-informed clinicians who may have allowed for the positive results found; this is both a strength and a limitation of the study.Several important limitations also need to be acknowledged. First, the sample size for this proof-of-concept analysis was small and statistically underpowered largely due to restrictions related to COVID-19; results from the full RCT will be forthcoming. Therefore, caution regarding overgeneralization is warranted for both the quantitative and qualitative data. Second, missing data within the outcome measures may have affected the accuracy of the data analysis. Third, some participants chose not to participate in all of the data collection, resulting in missing longitudinal data. Fourth, it has been widely acknowledged in the literature that standardized questionnaires for MI may be lacking in reliability, validity, and sensitivity [