Figure 2

Average Wf (JND normalized by physical numerosity), as a function of numerosity for the random (green dots) and symmetry (red dots) conditions. Continuous lines are two-limb linear functions that best fit the data (Eq. 2). Arrows indicate the switching point from the estimation to the density regime for random (green arrow) and symmetry (red arrow) condition, respectively. Error bars represent \(\pm\) 1 s.e.m.