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Martens (1) suggests that including model-based bias (e.g., prestige) in our experiment would have enhanced cumulative cultural evolution (CCE) in the larger populations reported in our paper (2). This is a plausible hypothesis, but not one our experiment was designed to test. Given the controversy around the relationship between population size and CCE (3), our experiment was designed to isolate the basic effect of population size on CCE by excluding extraneous factors, including model-based bias. In our experiment increasing population size did not enhance CCE. We do not conclude that larger populations do not enhance CCE but that other factors may be necessary to see … [↵][1]1To whom correspondence may be addressed. Email: nicolas.fay{at}gmail.com. [1]: #xref-corresp-1-1

Reply to Martens: Various factors may enable large populations to enhance cumulative cultural evolution, but more evidence is needed