They, like history museums and text books, are often handicapped by the fallacies of history as outlined by Thomas Schlereth. The untrained living history interpreter needs help to comprehend the subtleties of the historiography they are presenting. We all need that. Some of us have the luxury of apprenticing for two to five years to earn MA's and PhD's. It is optimistic to think that interpreters can perfect presentations in less time.
Training is fulfilling and valuable and essential for success.
Time for continuous training and refreshment must be included in all interpretation budgets. John Krugler argues that it is often viewed as a luxury in museums, is not included as a line item, and occurs only when grant funding supports it. This implies a lack of appreciation and support for research on the part of living history museums of early America. It is a problem with history museums of other types and other eras, also face. But adequate funding or the lack thereof cannot be an excuse for not doing a good job.