First nearest neighbor separation fraction distribution of multiple systems (solid blue histogram) versus single stars (dashed black histogram) for Class II and III objects observed at high angular resolution (HAR) in Taurus region. Each bin represents the number density of stars per unit logarithmic interval in projected separation, that is, the number density fraction of 1-NNS per (Δlog r = 0.2) interval. There is a marked excess of 1-NNS in the range 1−10 kAU for the multiple systems with respect to single stars.