世論調査の手法に関する現状と問題点(<特集>世論と世論調査)

抄録

Due to the decrease of response rate and the inspection limitation of basic resident register recently, the execution of public opinion poll faces many difficulties. At once the response rate of face-to-face interview had from 70% to 80%, but because of the increase of temporary absence and refusal, recent response rate decreased to 50% level. Especially the increase of refusal become remarkable and in addition to the increase of privacy consideration as a background, the shortage of understanding for meaning of survey and the evasion feeling of visitation by interviewer may exist. To deal with such a temporary absence and refusal, there are some movements of reevaluation of self-registering investigation such as drop-off/pick-up and postal survey. Once postal survey has a shortage of low response rate, some examples show the high response rate recently. And the opinion pools which can use such register has been limited due to the change of inspection system in the basic resident register and electoral roll. Moreover, there are issues that criteria and procedure of right or wrong of inspection are not unified each autonomy level. Recently, while public opinion polls conducted by mass-media are mainly persuaded by telephone survey of RDD, RDD has some issues that the increasing of young people who does not have fixed-line causes distortion of samples. To study more about these issues related to public opinion polls, it may be needed to share and discuss with the fielding methods among survey organizations.