Group velocity dispersion along the line of sight (upper panel), group extent on the sky (middle panel), and group virial mass (lower panel) as a function of redshift. Galaxy pairs are excluded from this figure. Groups with three or four members are shown as orange points, groups with at least five members as red points, and potentially merging systems in our catalogue as blue points. Despite the flux-limited nature of our galaxy sample, the group properties are roughly constant with redshift.