Research has found that people are much more likely to agree to help requests made in-person than those made via text-based media, but that help-seekers underestimate the relative advantage of asking for help face-to-face. It remains unknown what helpseekers' intuitions about the effectiveness of richer media channels incorporating audio and video features might be, or how these intuitions would compare with the actual effectiveness of face-to-face or email versus rich media requests. In two behavioral and two supplemental vignette experiments, participants expected differences in the effectiveness of seeking help through various communication channels to be quite small, or nonexistent. However, when participants actually made requests, the differences were substantial. Ultimately, help-seekers underestimated the relative advantage of asking for help face-to-face compared with asking through any mediated channel. Help-seekers also underestimated the relative advantage of asking through richer media channels compared with email.