Relative systematic error on fσ₈ at 0.5 <z < 0.7 as a function of s_min, for different values of r₀ (r₀ = 1 h^-1 Mpc and r₀ = 1.5 h^-1 Mpc) and when including or not redshift error. The error bars represent the relative statistical error associated to analysing the mean mock predictions. The shaded area shows the 1σ confidence region associated with the relative statistical error expected in VIPERS. The squares and triangles are artificially shifted along s_min axis to improve the clarity of the figure.