Relative errors of the recovered rotation velocities (upper panel) and velocity dispersions (bottom panel), computed using Eqs. (2) and (3) for the disturbed disks Freesia (diamonds) and the three disks (squares) of our sample as a function of resolution (number of independent resolution elements along the semi-major axis). Markers with the same color show the mock data for the same galaxy as indicated by the color-bar. The filled and empty markers show the errors for the rotation velocities and velocity dispersions obtained with ^3DBAROLO (forward-modeling) and with the velocity-gradient beam-smearing correction. The gray areas mark the 25 percentage.