Bone spoons for prehistoric babies: Detection of human teeth marks on the Neolithic artefacts from the site Grad-Starčevo (Serbia).

There are marginally significant differences in the median density of marks between the recipient and the handle segments, for the back (Mann−Whitney U = 14, exact p = 0.052) but not for the front side (Mann−Whitney U = 26, exact p = 0.361), with the recipient having the higher average density of marks on both sides of the spoon. 2) The scatterplot of mark densities of merged and unmerged quadrants (the second method of building observation units) (Plot B in Fig 12 ) suggests that there is no correlation between the front and the back mark density (r = -0.02, p = 0.454, N = 35).

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