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2) In GZH, the galaxies chosen to be FERENGI'd were from SDSS; so the pixel scale needed to be adjusted to match HST. This created a problem for the galaxies at the lowest redshifts, because these images couldn't be redshifted all the way to z = 1.0; so effectively these galaxies provided no useful data. Is there any reason not to start with Hubble galaxies at low z instead, to avoid this problem?     3) Evolution correction - Images were created with a number of assumed evolutions - I'm not sure this was well thought-out, and we should discuss how we could implement this most effectively to the new data.   \subsection{Illustris} \subsubsection{Illustris}  Illustris provides snapshots of galaxies at a wide range of redshifts, so these could also be used to quantify user bias. The advantage here is that we do not need to bin these in redshift bins - we could more easily fit a continuous function of vote fractions vs redshift, as there are ~60 snapshots of galaxies available between $0    If we do this with Illustris and FERENGI: an interesting comparison could be done by looking at the difference in user bias in the two samples. This might help us see which set is more "realistic" in matching what we'd expect for bias in the "real" (GZH) data.