Thirty-two subjects (16 women, 16 men) performed two tasks that were the result of adapting the heartbeat perception tasks produced by Whitehead et al. [Biofeedback Self-Regul. 2 (1977) 371] and Katkin et al. [Psychophysiology 19 (1982) 568], respectively. In the Whitehead task, the delay values were the standard 128 ms for the S+ stimulus and 384 ms for the S- stimulus after the R-wave in one case; in the other case, the delay values were individually adjusted according to the median of the distribution of interval choices in an adaptation of the Brener and Kluvitse [Psychophysiology 25 (1988a) 554; Psychophysiology 25 (1988b) 436] task carried out previously. In the Katkin procedure, in one case S+ always occurred at a fixed interval (100 ms), whereas S- occurred at uniformly increasing intervals in relation to the R-wave. In the other case, the S+ and S- intervals were also individually modified according to the performance in the Brener and Kluvitse task. The results indicate that when the S+ values are individually adjusted, the sensitivity of subjects, as reflected in the 2(arcsin(p(A)(1/2))) values, significantly improves in the Whitehead task. Additionally, it was seen that the performance deteriorated from the first to the last 50 trials, especially when the S+ values were adjusted.

中文翻译：

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通过单独调整 S+ 延迟值来促进辨别任务中的心跳自我感知

三十二名受试者（16 名女性，16 名男性）执行了两项任务，这些任务是适应 Whitehead 等人产生的心跳感知任务的结果。[生物反馈自我调节。2 (1977) 371] 和 Katkin 等人。[心理生理学 19 (1982) 568]，分别。在 Whitehead 任务中，在一种情况下，S+ 刺激的延迟值为标准 128 ms，R 波后的 S- 刺激为 384 ms；在另一种情况下，延迟值根据 Brener 和 Kluvitse [Psychophysiology 25 (1988a) 554；心理生理学 25 (1988b) 436] 任务以前进行过。在 Katkin 程序中，在一种情况下，S+ 总是以固定间隔（100 ms）出现，而 S- 以相对于 R 波均匀增加的间隔出现。在另一种情况下，S+ 和 S- 区间也根据 Brener 和 Kluvitse 任务的表现进行了单独修改。结果表明，当单独调整 S+ 值时，反映在 2(arcsin(p(A)(1/2))) 值中的受试者的敏感性在 Whitehead 任务中显着提高。此外，可以看到从第一次到最后 50 次试验的性能下降，尤其是在调整 S+ 值时。