Behaviour of the Scoccimarro model when varying the dispersion parameter σ₁₂. Points with error bars show the monopole (ℓ = 0) and quadrupole (ℓ = 2) measured using the volume-limited ideal parent mock samples of red galaxies. We show the errors corresponding to a single realisation to highlight the relative difference of precision at different scales as the errors on the mean are too small to appreciate their scale dependence. Black continuous and dashed thick lines show the best-fit Scoccimarro model with s_min =5  h⁻¹ Mpc. Thin continuous and dashed lines with colour spanning from blue to red are obtained fixing the growth rate to its fiducial value fσ₈ = 0.46 and the dispersion parameter varying from σ₁₂ = 0 to 10  h⁻¹ Mpc. The linear bias parameter is set to match the amplitude of the monopole at large scales.