Dana Rotman defended her Ph.D. dissertation on examining the motivations and cultures of volunteers participating in collaborative scientific projects in different countries. She conducted case studies of projects in the United States, India, and Costa Rica, surveying and interviewing volunteers. The findings showed that volunteers' motivations can change over time and are influenced by culture. In the US, motivations were primarily self-directed while in Costa Rica they were more collective. India showed a mix of both. Culture also impacted collaboration cycles, with potential attrition points varying between countries. The study provided insights into sustaining long-term volunteer participation across cultures.