The Respondent must be told at the beginning of the interview that recording techniques are to be used unless this knowledge might bias the Respondent's subsequent behaviour.

必须在访问开始时告诉被访者将使用记录设备，除非这可能偏导被访者随后的行为。

youdao

Strategic bias----A respondent provides a biased answer to a contingent valuation survey in order to influence a particular outcome.

战略偏差——提供给不确定价值测量偏差答案，而影响到专项支出的标准。

youdao