Intrinsic velocity dispersion, σ₀, as a function of the number of resolution elements within the outermost measurable radius, R_out, and inclination (i). The Spearman and Kendall rank correlation coefficients (ρ and τ, respectively) do not indicate a significant correlation of σ₀ with the inclination and resolution effects, although the uncertainties in both the coefficients and p-value are large. CRISTAL-03, which has R_out/beam_HWHM = 1.6 is excluded in the correlation analysis in Sect. 6.2.