Spaced education improves the retention of clinical knowledge by medical students: a randomised controlled trial - Kerfoot - 2006 - Medical Education - Wiley Online Library
Research summary on spaced education for medical students. The e-learning included emailed scenarios and questions. The summary and conclusion talk about medical knowledge, but since this is about scenarios it seems like there might be some decision-making skills being reinforced here too.
<b>Conclusion </b> Spaced education consisting of clinical scenarios and questions distributed weekly via e-mail can significantly improve students' retention of medical knowledge.