Tyson P D
Department of Psychology, Brock University, St. Catharines, Ontario, Canada.
Biofeedback Self Regul. 1987 Jun;12(2):105-19. doi: 10.1007/BF01000012.
Establishing a contingency between stress and a physiological response is essential in biofeedback. The sensitivity of high alpha to contingent stress was investigated by manipulating conditions known to influence stress, such as the distribution, predictability, and controllability of stressful stimuli, and number of tasks performed. Forty subjects were divided into stress and non-stress groups. Within each group, one-half had the dual-task of anticipating and increasing alpha activity. The other half was initially instructed to only anticipate alpha and, later, had the dual task of anticipating and controlling alpha. No feedback training was included to distribute the task-related stressor and allowed the assessment of self-control. All of the stress manipulations significantly influenced the effects of stress on alpha production. The dual-task subjects produced less alpha and less self-control than did training with control phased in after subjects learned to anticipate alpha. Without stress, phased-in control produced highly significant increases in alpha production and self-control without feedback. The use of an alpha-contingent feedback paradigm and anticipation training was related to the therapeutic applications of alpha feedback to stress and anxiety.
在生物反馈中，建立压力与生理反应之间的关联至关重要。通过操纵已知会影响压力的条件，如应激刺激的分布、可预测性和可控性以及执行的任务数量，来研究高α波对应激关联的敏感性。40名受试者被分为应激组和非应激组。在每组中，一半受试者有预期并增加α波活动的双重任务。另一半受试者最初被指示仅预期α波，之后则有预期并控制α波的双重任务。未包括反馈训练以分散与任务相关的应激源，并允许进行自我控制评估。所有应激操纵均显著影响应激对α波产生的作用。与在受试者学会预期α波后逐步引入对照的训练相比，执行双重任务的受试者产生的α波更少，自我控制能力也更弱。在无应激情况下，逐步引入对照在无反馈时能使α波产生和自我控制能力显著提高。使用α波关联反馈范式和预期训练与α波反馈在应激和焦虑治疗中的应用有关。
