Deregowski, J. B., Muldrow, E. S. & Muldrow, W. F. (1972). Pictorial recognition in a remote Ethiopian population. Perception, 1, 417-425.

A sample of Me'en (Mekan) drawn from a population having minimal contact with pictorial materials was found to be able to recognise correctly, albeit gradually and with a degree of effort, clearly depicted animals. They did make however some responses which in the west would be considered anomalous, and appeared to find the task stressful.