Results for experiments 2 (red) and 4 (blue). The left panel shows the difference between the fitted T_eff (derived from the photometry with CHORIZOS) and the T_eff derived from the spectral classification (assumed to be the real T_eff) as a function of the latter. The right panel is the same plot but with the vertical axis normalized by the uncertainties (an ideal solution would have a mean of zero and a standard deviation of 1 without depending on T_eff). Note that a small amount of random noise (standard deviation of 200 K) has been introduced in the horizontal values to decrease the superposition between different objects.