Snowdon J
Psychol Med. 1980 Feb;10(1):165-70. doi: 10.1017/s0033291700039714.
Two groups of medical students answered a modified version of the Leyton Obsessional Inventory twice, with 8 weeks between tests. On one occasion it was administered in its original card-sorting (postbox) form; on the other, it was given as a written questionnaire. Fifty students answered the postbox form first, 50 the questionnaire first. Correlation between the 2 tests was reasonably good (r = 0.73-0.77). Scores on the first occasion of testing were significantly higher than on the second, but differences between scores on the 2 forms were not significant. Mean scores of male and female students were similar.
两组医学生两次回答了莱顿强迫观念量表的一个修改版本，两次测试间隔8周。有一次是以原始的卡片分类（邮箱）形式进行测试；另一次则是以书面问卷的形式进行。50名学生先回答邮箱形式的问卷，50名学生先回答问卷形式的问题。两次测试之间的相关性相当好（r = 0.73 - 0.77）。第一次测试的分数显著高于第二次，但两种形式的分数差异不显著。男女生的平均分数相似。
