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. Author manuscript; available in PMC: 2016 Jul 13.
Published in final edited form as: Child Dev. 2016 Jan-Feb;87(1):29–37. doi: 10.1111/cdev.12489

Figure 2.

Figure 2

Number of PubMed citations from 1983 to 2014 using the following search terms: (1) “epigenetics,” including articles on cancer and nonhuman studies; (2) “epigenetics and disease”; (3) “epigenetics, disease, and behavior,” filtering out cancer articles, but including nonhuman studies; (4) “epigenetics and human behavior,” filtering out the nonhuman studies; and (5) “epigenetics and child development.” We used a logarithmic scale to display publications by year because there were a large number of studies published using search terms 1–3, and fewer for search terms 4–5, that is, to adjust for the negative skewness in the data. The actual number of studies that correspond to the log-transformed values is shown on the z-axis.