Bisson C, Whissell C
Psychol Rep. 1989 Aug;65(1):179-84. doi: 10.2466/pr0.1989.65.1.179.
22 women participated in a study that required daily completion of the Emotions Profile Index and a short diary form for 49 consecutive days. The Emotions Profile Index for 868 subject-days was factor-analyzed. Differences in Factor 1 (friendly extraversion) were related to menstrual cycle position while differences in Factor 2 (timidity) were not. Evidence for a premenstrual move in the direction of aggressive, depressed distrust (irritable introversion) is discussed. It is noted that premenstrual differences in emotion are much weaker than the other significant effects discovered in the experiment (individual differences, unusual events, stress): the potentially cumulative effects of these variables are discussed.
22名女性参与了一项研究，该研究要求她们连续49天每天完成情绪特征指数和一份简短的日记表格。对868个受试者日的情绪特征指数进行了因子分析。因子1（友好外向）的差异与月经周期阶段有关，而因子2（胆小）的差异则无关。文中讨论了经前情绪向攻击性、抑郁性不信任（易怒内向）方向转变的证据。需要注意的是，经前情绪差异比实验中发现的其他显著影响（个体差异、异常事件、压力）要弱得多：文中讨论了这些变量潜在的累积影响。
