Dr. John DenBoer tracks the success of his SMART Memory Program participants through a combination of ongoing assessments, participant feedback, and research studies. He incorporates regular cognitive evaluations to monitor improvements in cognitive function and overall well-being among participants. Additionally, testimonials from participants provide qualitative insights into their experiences and the effectiveness of the program. By analyzing both quantitative data from assessments and qualitative feedback, Dr. DenBoer can evaluate the program's impact on dementia prevention and make necessary adjustments to enhance its effectiveness.