“Don't Know” Item Nonresponse in a Telephone Survey: Effects of Question Form and Respondent Characteristics
通过分半实验调查了问题形式、内容和受访者经验/参与度对态度问题中“不知道”无回答指标的影响，支持了Schuman和Presser的阈值模型，发现经验/参与度不同的受访者在无回答随量表点和问题具体性变化上存在差异。
Effects of question form, question content, and respondent experience/involvement factors on indicators of “don't know” item nonresponse to attitude questions were investigated in a split-ballot experiment with 398 respondents. Results provide support for premises of the threshold model formulated by Schuman and Presser. Experienced/involved respondents and those with little experience/involement are found to differ in the degree to which item nonresponse varies with the number of scale points and question specificity. Implications and research directions are provided.