Ditto B, Miller S, Maurice S
Department of Psychology, McGill University, Montreal, Quebec, Canada.
Biol Psychol. 1987 Aug;25(1):23-31. doi: 10.1016/0301-0511(87)90065-2.
To determine if response consistency is higher in older women, twenty young adult (mean = 20 years) and twenty-two elderly (mean = 82 years) women participated in a 20-min stress protocol including serial subtraction, anxiety and anger imagery tasks. All subjects were healthy and free of diagnosed cardiovascular disease. Heart rate (HR), systolic blood pressure (SBP), and diastolic blood pressure (DBP) responses to the tasks were assessed. To allow comparisons of the effects of stress on different cardiovascular parameters, all baseline-stress change scores were converted to z-scores. Forty-two 3(parameter)X3(stressor) matrices of z-scores, one for each subject, were created. Intraclass correlations computed using these matrices revealed greater consistency of response hierarchies (e.g., DBP greater than SBP greater than HR) among elderly subjects. Possible mechanisms for this effect are discussed.
为了确定老年女性的反应一致性是否更高，20名年轻成年女性（平均年龄 = 20岁）和22名老年女性（平均年龄 = 82岁）参与了一项20分钟的应激方案，其中包括连续减法、焦虑和愤怒意象任务。所有受试者均健康且未被诊断出患有心血管疾病。评估了任务期间的心率（HR）、收缩压（SBP）和舒张压（DBP）反应。为了比较应激对不同心血管参数的影响，所有基线-应激变化分数均转换为z分数。为每个受试者创建了42个3（参数）×3（应激源）的z分数矩阵。使用这些矩阵计算的组内相关性显示，老年受试者的反应层次结构（例如，DBP大于SBP大于HR）具有更高的一致性。讨论了这种效应的可能机制。
