Figure 4
From: Psychological and physiological evidence for an initial ‘Rough Sketch’ calculation of personal space

Personal space size measured to human intruders (y axis) is highly correlated with the personal space size measured to virtual intruders (x axis). Each dot represents the average personal space size measured in each subject using the Stop Distance Procedure (SDP) (n = 19). Panel (a) shows the correlation in the passive SDP measurements, and Panel (b) shows the correlation in the active SDP measurements.