COLLOQUIUM Correction for “Young children communicate their ignorance and ask questions,” by Paul L. Harris, Deborah T. Bartz, and Meredith L. Rowe, which was first published July 25, 2017; 10.1073/pnas.1620745114 (Proc Natl Acad Sci USA 114:7884–7891).
The authors note that on page 7887, right column, second full paragraph, lines 9–11, “At 22 mo, one-fifth of the sample had been observed producing a flip to signal ignorance, and by 42 mo, almost half had done so” should instead appear as “At 22 mo, almost one-third of the sample had been observed producing a flip to signal ignorance, and by 42 mo, three quarters had done so.”