This approach relies on living cultures that may be closely genetically or spatially related to the archaeological culture of interest in order to form analogies that may be used to explain findings. Gould and his team explains how archaeologists should be able to measure the degree of differences between the tools found with the ethnographic material and the artifacts [8] However, while this technique may be useful it is important to note that it does not account for cultural change over time.[2] The "folk cultural approach" is the Old World equivalent to this and the term may be used in place of the direct historical approach.[3]