Children are no longer neglected as respondents in large-scale surveys. Researchers are convinced that information about perspectives, attitudes, and behaviors of children should be collected from the children themselves. Regarding adults, empirical evidence shows that respondent characteristics as well as question characteristics affect response quality. Because children are in process of developing their cognitive and social skills, it is expected that answering questions in surveys brings along additional problems concerning response quality. So far however, methodological expertise on surveying children is scarce, and researchers rely on ad-hoc knowledge from fields such as child psychiatry and educational testing, or on methodological knowledge on surveying adults. In this article we report results of a secondary analysis on several data sets. The multi level meta-analysis was directed on the (interaction) effects of child characteristics and question characteristics on the reliability of responses.