M_UV and redshift distribution of our spectroscopic sample (small red squares). We compared our sample with a photometric one (small black open circles), selected with a magnitude cut of 29.5 in the F277W filter. The big red squares and the big black open circles represents the medians and median absolute deviation of M_UV in the same bins of redshift used in this paper (z < 6.5, 6.5 < z < 8.5 and z > 8.5) for our spectroscopic sample and the photometric one, respectively. In both cases, we considered only galaxies brighter than M_UV, lim = −18.5 (shown as the dotted pink line).