Policy makers in education and international development have lately gravitated toward the randomized controlled trial (RCT)—an evaluation design that randomly assigns a sample of people or households into an intervention group and a control group in order to measure the differential effect of the intervention—as a means to determine program impact. As part of federal regulations, the U.S. Department of Education and the U.S. Agency for International development explicitly declared a preference for the RCT. When advocating for adopting the RCT model as the preferred evaluation tool, policy makers point to the success story of medical trials and how they revolutionized medicine from Medieval charlatanry to a modern life-saving discipline. By presenting a more nuanced account of the role of the RCT in medical history, however, this study finds that landmark RCTs were accompanied with challenges, Evidence-Based Medicine had rightful critics, and opportunistic biases in drug trials apply equally to education policy and international development. This study also examines the recent privileged role of the RCT in education and international development, concluding that its initial promise was not entirely born out when put into practice, as the national Reading First Initiative exemplifies. From a comparative perspective, the RCT movements also encountered major RCT critics, whose voices were not initially heard. These voices, however, seem to have contributed to a swing of the pendulum away from RCT primacy back towards greater methodological pluralism. A major conclusion of this study is that policy makers should exercise great caution when using RCTs as a policy evaluation tool. This conclusion is arrived at via considering RCT biases, challenges, and limited generalizability; understanding its interpretive-qualitative components; and broadening the overall methodological repertoire to better enable evaluations of macro-policy interventions. / text

This thesis uses the lens of building technology to examine cultural exchange and its relationship to the building crafts. By focusing on masonry vaulting in India, my research brings together two worlds – one that shines light on the variety of innovative masonry shell construction techniques that exist in the county and another that seeks to evaluate the scope of tile vaulting, an over 600-year old Mediterranean building technique, within India’s evolving building crafts culture. This thesis is organized in three parts: PART ONE Tile Vaulting and Relevance Today | A Brief History of Masonry Shells in India Part one introduces tile vaulting’s unique principles compared to other vaulting traditions while contextualizing its relevance to present day India. A survey of varied masonry vaulting techniques and modules, endemic and imported, practiced across India is presented against the backdrop of what is a predominantly reinforced concrete-based construction industry. PART TWO Modules, Methods and Motivations The second part of this research comprises case studies that include some of India’s most iconic buildings such as the Villa Sarabhai by Le Corbusier, the National Institute of Design by Gautam Sarabhai and Sangath by B.V. Doshi, each of which employed innovative construction techniques for its vaults. The production and use of the enigmatic ceramic fuses in India is examined for the first time alongside their indigenous cousins: burnt clay tubes. Together with Muzaffarnagar vaulting, the case studies reveal cultural motivations for architectural expression and production in postcolonial India. PART THREE Prototypes | Comparatives | Limitations & Extension of Research Part three presents five tile vaulting prototypes in India constructed with local artisans to gain understanding of its cultural reception, assess effective transfer of skills and potential internalisation. Recommendations for tile vaulting’s potential uptake into mainstream architectural production is evaluated by comparing findings against prevalent building methods and by contextualizing current architectural trends and social policy. Limitations and scope for extension of research are also discussed.