Harrison D W, Kelly P L, Gavin M, Isaac W
Department of Psychology, Virginia Polytechnic Institute & State University, Blacksburg 24061.
Biol Psychol. 1989 Aug;29(1):1-9. doi: 10.1016/0301-0511(89)90046-x.
The purpose of the present study was to assess and compare the effects of within and between-session exposure to environmental context on left temporal artery pulse amplitude, right temporal artery pulse amplitude, and left digital pulse amplitude. Subjects were individually tested for 20 min daily over a period of eight consecutive days. A significant interaction was found for Position X Interval. These results show that exposure to the experimental context occurs with diametrically opposite effects on temporalis and digital pulse amplitude within session. Moreover, these results would support the hypothesis that controversial findings within the headache and biofeedback literature may be partially attributable to methodological differences where, for example, different authors use different transducer locations and/or evaluate pulse amplitude at different points within or among sessions. Indeed, research on the effects or lack thereof of therapeutic manipulations may have little or nothing to do with the intervention or experimental manipulations themselves. These effects may be masked or augmented by subject and methodological confounds during baseline and testing conditions.
本研究的目的是评估和比较在同一疗程内以及不同疗程之间暴露于环境背景对左颞动脉脉搏振幅、右颞动脉脉搏振幅和左手指脉搏振幅的影响。在连续八天的时间里，受试者每天接受20分钟的单独测试。发现位置X间隔存在显著交互作用。这些结果表明，在同一疗程内，暴露于实验环境对颞肌和手指脉搏振幅产生了截然相反的影响。此外，这些结果将支持这样一种假设，即头痛和生物反馈文献中存在争议的研究结果可能部分归因于方法学上的差异，例如，不同的作者使用不同的传感器位置和/或在疗程内或疗程之间的不同时间点评估脉搏振幅。事实上，关于治疗操作效果或其缺乏效果的研究可能与干预或实验操作本身几乎没有关系。在基线和测试条件下，这些效果可能会被受试者和方法学上的混杂因素所掩盖或增强。
