Comparison between VDFs constructed from galaxy samples identified using v/σ-based and sSFR-based selections in five EAGLE simulations. Black circles show the observed VDF derived from SDSS field galaxies at 0.03 ≤ z ≤ 0.10 (Sohn et al. 2017a). Symbols are identical to those of Figure 8. Error bars on the solid lines indicate Poisson errors. We only display the upper values with arrows for bins including fewer than ten galaxies.