BIC-weighted velocity dispersions of the SL2S sample as a function of redshift. The green, red, and black markers show galaxies in three different S/N bins, S/N > 20, 13 < S/N ≤ 20, and S/N > 20, respectively. The associated error bars show the total uncertainties in the measured velocity dispersions and are dominated by the statistical uncertainties, which are driven by the S/Ns.