Fragmentation properties of the NGC 1333 fibers (red solid points): number of fragments (upper panel) and average core mass (lower panel) as a function of the fiber mass-per-unit-length (m_lin). The results of the linear fit of the data (blue dashed line), as well as their Pearson correlation coefficient (r) and the probability of the two distributions to be drawn from a random sample (p-value), are indicated in the lower right corner of each plot.