One-point correlation function Ψ (Eq. (7), blue symbols) and estimated pair correlation function g (gray symbols) using the sample of stars within W_in. The pair correlation function has been estimated using the estimator given in Eq. (6) while performing 10 000 random Monte Carlo samplings within W_in. The 1σ vertical errorbars of Ψ and g are estimated from Poisson statistics. The solid horizontal blue line represents both the constant Ψ = 1 and ĝ = 1 functions, that is, the one-point and pair correlation function expected for a spatial random distribution. Vertical black solid lines delimit three spatial regimes, clustering, inhibition, and dispersion, derived from the crossing of the Taurus Ψ function with the Ψ = 1 horizontal line associated to random spatial distribution. The vertical dashed purple line indicates the 7′′ spacing threshold used to group stars into a unique multiple system. The dotted-dashed green line is the Ψ ∝ r^-1.5 function resulting from a linear regression fit taking into account vertical errorbars over ten 1-NNS logarithm bins (Δlog r = 0.2). The Ψ function may reveal an extended binary regime from 1.6 kAU to 100 kAU in Taurus, which has remained unidentified beyond approximately 5 kAU in previous works that used the pair correlation function alone, since the latter reveals a power law break around that separation.