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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Meth Psychol. 2021 Jul 24;5:100063. doi: 10.1016/j.metip.2021.100063

Figure 1 |. Growing demand by researchers for databases of face photographs.

Figure 1 |

Since 2000, the number of scientific papers referring to “face photographs” (or a variant thereof) has increased from under 800 papers to well over 3,500 per year since 2016. This growing body of literature represents a net scientific contribution of around 50 thousand papers.