Risavi, B., Terrell, M., Lee, W. and Holsten, D. (2013). Prehospital Mass-Casualty Triage Training—Written Versus Moulage Scenarios: How Much Do EMS Providers Retain? Prehospital and Disaster Medicine. 28(3): 251-256.
The authors found that there was no difference in skill retention for written vs. moulage scenarios immediately after participants received training in START triage. However, they did find a significant decline in skill retention when participants were evaluated 6 months after training.