Access Panel und Mixed-Mode Internet Survey

在过去的几年里，访问面板的分布非常广泛。因此，首要目标是检查访问面板方法的调查研究的适用性。这主要意味着测试从访问面板框架中抽取的抽样调查是否可能做出有效的推断。这类推论的有效性面临两个主要威胁：a)自我选择过程和b)模式/反应效应。项目头两年的重点是建立一个基于概率抽样的大型访问面板和详细的无反应分析，以评估招募样本的质量，从而评估最终访问面板抽样框架的质量。现在，第二个两年将继续这些关于回答倾向、采访者效应、调查合作和后续调查合作的分析，并将其扩展到对访问面板和真实面板影响调查问题回答的方式的彻底分析（面板调节的影响）。此外，将分析小组人员流失（随着时间的推移受访者的流失）。由于大多数访问面板都是“在线”面板，我们必须认真对待与此模式相关的可能的调查模式和响应效果。因此，将进行一系列七个调查模式实验，以分析调查模式如何影响或塑造调查问题的回答，特别是使用电话模式进行比较。

Access panels have found a remarkable spread in the last years. Therefore an overarching objective is to examine the access-panel approach to survey research for its suitability. Primarily this implies to test if sample surveys drawn from access panel frames make valid inferences possible. There are two major threats to the validity of such inferences: a) selfselection processes and b) mode/response effects.The 1st two project years focused on building-up a large probability-sampling based access panel and a detailed nonresponse analysis, to assess the quality of the recruitment sample and hence the quality of the resulting access-panel sampling frame. Now, the 2nd two years will continue these analyses on response propensity, interviewer effects, survey cooperation and follow-up survey cooperation, and will extend them to a thorough analysis of the ways access panels and genuine panels shape responses to survey questions (effects of panel conditioning). In addition panel attrition (loss of respondents over time) will be analyzed.As most access panels are “online” panels we have to take seriously possible survey-mode and response effects associated with this mode. Therefore a series of seven survey-mode experiments will be carried out to analyze how responses to survey questions are affected or shaped by survey mode, using in particular the telephone mode for comparison purposes.