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1·It is also subject to interviewer bias or distortion.

这种方法也受到采访对象的偏见或歪曲的观点的影响。

2·Personal interviewing is the most expensive method and requires more administrative planning and supervision. It is also subject to interviewer bias or distortion.

当面采访是罪昂贵的方法，它需要更周密的计划与指导。当然它还会带有被采访者的偏见与歪曲。

3·Personal interviewing is the most expensive method and requires more administrative planning and supervision . It is also subject to interviewer bias or distortion.

当面采访是罪昂贵的方法，它需要更周密的计划与指导。当然它还会带有被采访者的偏见与歪曲。