Assess the effects of adaptive learning systems on competency mastery and learner engagement in adult professional development: analyze personalization mechanisms (adaptive pathways, feedback loops, pacing), relevant outcome metrics (pre/post competency, time-to-competency, retention, engagement analytics), appropriate study designs (experimental, quasi-experimental, longitudinal), validity threats and confounders, instructional design and scalability implications, and ethical/equity considerations; require evaluation of evidence, interpretation of learning-analytics dashboards, and recommendations for assessment and design improvements.