REPRESENTATIVENESS OF THE RETURNED SAMPLES ON MAIL QUESTIONNAIRE

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  • <総合研究>郵送調査における回収応答からの一般化の限界
  • 郵送調査における回収応答からの一般化の限界
  • ユウソウ チョウサ ニ オケル カイシュウ オウトウ カラ ノ イッパンカ ノ ゲンカイ

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Non-returned subjects on the mail questionnaire were interviewed about same topics, which were to be compared with responses of the returned subjects. Topics were about "entrance-examination systems of the high school". Subjects finally interviewed were 279 mothers of the middle school pupils. They were divided into four groups as follows; (1) the returned samples without follow-up, (2) the samples returned by the 1st follow-up, (3) the 2nd follow-up, and (4) the non-returned samples. Statistically significant differences among four groups were founded in some topics. The results indicated that the returned and the non-returned groups were samples of the different populations respectively. It was also suggested that the degree of involvement of the subjects about topics was one of the factors which caused those differences.

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