Introduction / Marcel Das, Peter Ester, and Lars Kaczmirek — Internet survey methods : a review of strengths, weaknesses, and innovations / Jolene D. Smyth and Jennie E. Pearson — Internet surveys as part of a mixed-mode design / Edith D. de Leeuw and Joop J. Hox — “True” longitudinal and probability-based Internet panels : evidence from the Netherlands / Annette C. Scherpenzeel and Marcel Das — How representative are online panels? : problems of coverage and selection and possible solutions / Annette C. Scherpenzeel and Jelke G. Bethlehem — Ethical considerations in Internet surveys / Eleanor Singer and Mick P. Couper — How visual design affects the interpretability of survey questions / Vera Toepoel and Don A. Dillman — Attention and usability in Internet surveys : effects of visual feedback in grid questions / Lars Kaczmirek — Using interactive features to motivate and probe responses to open-ended questions / Marije Oudejans and Leah Melani Christian — Measuring attitudes toward controversial issues in Internet surveys : order effects of open and closed questioning / Peter Ester and Henk Vinken — Challenges in reaching hard-to-reach groups in Internet panel research / Corrie M. Vis and Miquelle A.G. Marchand — Mode and context effects in measuring household assets / Arthur van Soest and Arie Kapteyn — Internet survey paradata / Dirk Heerwegh — Use of eye tracking for studying survey response processes / Mirta Galesic and Ting Yan — Can biomarkers be collected in an Internet survey? : a pilot study in the LISS panel / Mauricio Avendano, Annette C. Scherpenzeel, and Johan P. Mackenbach — Discussion and conclusions / Marcel Das, Peter Ester, and Lars Kaczmirek.