Individual level data from the cylinder and A not B tasks published in:
MacLean, E. L., Hare, B., Nunn, C. L., Addessi, E., Amici, F., Anderson, R. C., ... & Boogert, N. J. (2014). The evolution of self-control. Proceedings of the National Academy of Sciences, 111(20), E2140-E2148.