I've seen some qualitative work on this, and I'm in the process of tracking down quantitative work as well. I've seen reasons cited like privacy (i.e., "I don't want him talking to strangers"), age and appropriateness of topics (i.e,. "I don't want her talking to a stranger about personal topics"). From the focus groups I've observed, I have a feeling that dad's of daughters are the group most likely to refuse participation. Is there any research to support that?
Any key papers on surveying teens and minors that I should be looking at? Any surveys using particularly innovative methods for increasing parent consent? I know the general survey methods literature well, but I'm wondering if there are good papers that might be hiding out there in other fields (or that passed under my radar). The context is phone, mail, and face-to-face surveys specifically, not school-based or doctor-based studies, or surveys where kids can opt themselves in without parent consent.
Thanks in advance for anything you have to share.