Yartz Andrew R, Zvolensky Michael J, Bernstein Amit, Bonn-Miller Marcel O, Lejuez C W
Department of Psychology, University of Vermont, Burlington, VT 05405-0134, USA.
J Abnorm Psychol. 2008 Feb;117(1):242-6. doi: 10.1037/0021-843X.117.1.242.
In the present investigation the authors evaluated the role of verbally instructed safety periods as they relate to predictability preference within a single-session challenge paradigm involving recurrent administrations of 20% carbon dioxide (CO-sub-2) enriched air. Participants included 160 nonclinical young adults (91 women, 69 men) between the ages of 18 and 59 (M=21.6 years; SD=7.23). Results indicated that equivalent levels of anxiety were experienced during predictable and unpredictable administrations of 20% CO-sub-2, yet participants preferred predictable compared with unpredictable trials, with women showing a stronger predictability preference than men. Lower anxiety was reported during known safety periods (predictable room air trials) but not during predictable compared with unpredictable administrations of 20% CO-sub-2. Findings are discussed in relation to theoretical and applied implications for the role of predictability in the nature of anxiety and its disorders.
在本研究中，作者评估了口头指示的安全期在涉及反复给予20%二氧化碳（CO₂）富集空气的单节挑战范式中与可预测性偏好的关系。参与者包括160名18至59岁的非临床青年成年人（91名女性，69名男性）（M = 21.6岁；SD = 7.23）。结果表明，在可预测和不可预测地给予20% CO₂期间，焦虑水平相当，但与不可预测的试验相比，参与者更喜欢可预测的试验，女性表现出比男性更强的可预测性偏好。在已知的安全期（可预测的室内空气试验）期间报告的焦虑较低，但在可预测与不可预测地给予20% CO₂期间则不然。研究结果结合可预测性在焦虑本质及其障碍中的作用的理论和应用意义进行了讨论。
