Vera Toepoel is a Professor at the department of Methods & Statistics at Utrecht University, the Netherlands. She has fifteen years of experience in online surveys, both from a practical and theoretical point of view. She started with programming online surveys and cleaning data. Later, she did her PhD on the design of online (panel) surveys, taking visual design, panel conditioning and attrition into account. Currently, she teaches courses on conducting surveys and is involved in several survey projects. She has build and maintained online panels, e.g. the Dutch LISS Panel, CentERpanel, and L...