Wittkamp Martin F, Bertsch Katja, Vögele Claus, Schulz André
Clinical Psychophysiology Laboratory, Institute for Health and Behaviour, University of Luxembourg, Esch-sur-Alzette, Luxembourg.
Clinical Psychology and Psychotherapy, Department of Psychology, University of Hamburg, Hamburg, Germany.
Psychophysiology. 2018 Jun;55(6):e13055. doi: 10.1111/psyp.13055. Epub 2018 Jan 16.
Interoceptive accuracy (IAc), that is, the ability to accurately perceive one's own bodily signals, is widely assumed to be a trait, although experimental manipulations such as stress may affect IAc. We used structural equation modeling to estimate the reliability of IAc, and the proportions of individual differences in IAc, explained by a trait and occasion-specific effects of situation and person-situation interactions. We assessed IAc in 59 healthy participants (40 women, M = 23.4 years) on three consecutive measurement occasions, approximately 1 week apart, in a rest and poststress condition, using a heartbeat counting and a heartbeat discrimination task. The results showed fair temporal stability (intraclass correlation coefficients ≥ 0.38) and good reliability (Mdn = .63; range .49-.83) for both methods. While around 40% of the variance of a single IAc measurement could be explained by a trait, approximately 27% was accounted for by occasion-specific effects of situation and person-situation interaction. These results suggest that IAc measures are relatively consistent and that situations and person-situation interactions impact IAc as measured at a certain point in time. An aggregation across at least two measurements is recommended when using IAc as a trait variable.
内感受准确性（IAc），即准确感知自身身体信号的能力，尽管诸如压力等实验操作可能会影响IAc，但人们普遍认为它是一种特质。我们使用结构方程模型来估计IAc的可靠性，以及IAc中个体差异的比例，这些差异由特质、情境的特定场合效应以及人 - 情境交互作用来解释。我们在休息和应激后状态下，使用心跳计数和心跳辨别任务，对59名健康参与者（40名女性，平均年龄M = 23.4岁）进行了连续三次测量，每次测量间隔约1周。结果表明，两种方法都具有相当的时间稳定性（组内相关系数≥0.38）和良好的可靠性（中位数 = 0.63；范围0.49 - 0.83）。虽然单次IAc测量的约40%的方差可以由特质来解释，但约27%是由情境的特定场合效应和人 - 情境交互作用所导致的。这些结果表明，IAc测量相对一致，并且情境和人 - 情境交互作用会影响在某个时间点测量的IAc。当将IAc用作特质变量时，建议至少进行两次测量的汇总。
