Assess the learner’s ability to design a rigorous mixed-methods research protocol to evaluate the impact of urban green infrastructure on adult mental health outcomes. The quiz will test skills in formulating research aims and hypotheses, selecting appropriate conceptual frameworks, choosing and justifying quantitative (study design, sampling, measures, power/sample-size) and qualitative methods (sampling, interview/focus group guides, thematic approach), planning data collection and integration strategies (convergent/sequence), addressing confounding and bias, outlining analytic techniques, handling ethics and stakeholder engagement, and identifying limitations and dissemination strategies within urban contexts.