FWHM[Hβ] vs. R _{Fe II} for our sample (stars), the GN sample (dots), and the GW sample (squares). We color-code the points by W _r [O III] to illustrate the distribution of these quasars in the Eigenvector 1 plane. The error bars for the comparison samples are not shown for display purposes. Compared to typical quasars, WLQs show stronger optical Fe II emission and weaker [O III] emission in general.