中華心理衛生協會

Randomized response technique is an efficient tool in the investigation of sensitive issues. Its essential logic is based on the protection of privacy. The more the personal privacy is protected, the more the respondent is willing to give honest answers for sensitive issues. For a long time, the development of randomized response technique has focused on the improvement of privacy protection to raise the sense of security and cooperation for investigation. In this paper, based on statistics, we prove that the sensitive behavior estimators appeared in Warner model and unrelated question model are superior; therefore, investigators can apply it with confidence. In addition, we further include the validity consideration of estimators to assist with the determination of model’s key parameter p (p is the probability that respondents pick the sensitive issue). In the end, we conduct an investigation for the proportion of pre-martial sexual behavior in campus via unrelated question model. From the viewpoints of privacy protection, confidence in application and application scope, the randomized response technique is superior to anonymous questionnaire.