Relationships between parameters inferred from the light curves of SNe Ibn. Top left: R/r-band peak magnitude versus rise time. Top right: R/r-band peak magnitude versus R/r-band decline rate. Centre left: Rise time versus R/r-band decline rate. Centre right: Peak luminosity (L_peak) versus t_0.5 (the time required for the luminosity to decline by half from its peak). Bottom left: Kinetic energy (E_K) versus synthesised ⁵⁶Ni mass. The weighted Pearson correlation coefficient (r_P), the Spearman rank correlation coefficient (r_S), and the associated p-values (probability of chance correlation) are provided for each parameter pair. Statistics exclude data points with rise time and peak magnitude limits.