Montrone S, Minervini M M, Di Benedetta C
Boll Soc Ital Biol Sper. 1980 Oct 30;56(20):2090-6.
The Horne and Hostberg questionnaire to differentiate "morning" and "evening" types was adopted to study the morningness-eveningness in I44 medical students. Furthermore the reliability of the proposed typology was assessed by using the cluster analysis, which partially confirmed the categories of Horne and Ostberg, since the clusters were characterized by the presence of subjects belonging to different types. No difference by sex was observed by either method. By means of the cluster analysis it was possible to identify 20% of evening and 40% of morning types.
采用霍恩和奥斯伯格问卷来区分“早晨型”和“晚上型”，以研究144名医学生的晨型-夜型情况。此外，通过聚类分析评估了所提出类型学的可靠性，该分析部分证实了霍恩和奥斯伯格的类别，因为聚类的特征是存在属于不同类型的受试者。两种方法均未观察到性别差异。通过聚类分析，可以确定20%的晚上型和40%的早晨型。
