Redshift measurement differences between two independent observations of the same object, obtained from a set of 2466 VIPERS galaxies with quality flag ≥ 2, plotted as a function of the object redshift. Non-matching measurements (defined as being discrepant by more than | Δz | = 0.005) have been excluded from the plot. The dashed red and continuous blue lines show the 1-sigma scatter estimates obtained assuming the scatter to be independent from z, or scaling as (1 + z), respectively.