 The most lively contemporary debates about education research, however, were set in motion around the turn of the millennium when the US Federal Government moved in the direction of funding only rigorously scientific educational research—the kind that could establish causal factors which could then guide the development of practically effective policies. (It was held that such a causal knowledge base was available for medical decision-making.) The definition of “rigorously scientific”, however, was decided by politicians and not by the research community, and it was given in terms of the use of a specific research method—the net effect being that the only research projects to receive Federal funding were those that carried out randomized controlled experiments or field trials (RFTs). It has become common over the last decade to refer to the RFT as the “gold standard” methodology.