Comparison of the A_V derived here from the (V − J) colors compared to the literature values derived also from the optical. References appear in Table C.1. Red points show stars with high veiling. For these, the spectroscopic measurement by Herczeg & Hillenbrand (2014) is preferred. The dashed line represents A_V (V − J) = A_V(lit). The stars with the largest scatter are strongly veiled, and the extinction measured with photometry is less reliable. For GO Tau (four black symbols at the bottom, close to A_V (V − J) = 0), the A_V (V − J) value is discarded because it is inconsistent with the literature. Another outlier is the A_V of V807 Tauas measured by KH95; this value is discarded for the same reason.