表題番号：2025C-563
日付：2026/03/31
研究課題認知的情報処理に及ぼす唾液中コルチゾールの影響性の実験的検討
| 研究者所属（当時） | 資格 | 氏名 | |
|---|---|---|---|
| （代表者） | 人間科学学術院 人間科学部 | 教授 | 嶋田 洋徳 |
| （連携研究者） | 大学院人間科学研究科 | 大学院生 | 石川 律 |
- 研究成果概要
- Within the framework of stress management based on cognitive behavioral therapy, the goal is to increase opportunities to approach rewards, and it has been noted that interventions must be tailored to account for various individual differences. Among these, salivary cortisol reactivity to stressor is cited as a prime example of physiological individual differences. Findings from previous studies indicate that salivary cortisol reactivity influences psychological decision-making processes; for example, it has been shown that rising cortisol levels lead to differences in task accuracy. Based on these findings, it is inferred that coping strategies in stress management differ depending on cortisol reactivity; however, the influence of salivary cortisol on the selection of coping strategies has not been empirically examined. Therefore, the aim of this study was to descriptively examine the relationship between salivary cortisol and coping strategies.
The study participants consisted of 47 undergraduate and graduate students (mean age 21.2±2.7 years). Participants were divided based on the area under the curve (AUCI) of salivary cortisol concentrations in response to a standard stressor (high AUCI group: n=23; low AUCI group: n=24). Data analysis was conducted in each group using measures of behavioral activation, reward perception, and depression. The results indicated that reward perception mediated the relationship between behavioral activation and depression only in the low AUCI group (low AUCI group: indirect effect=−0.571, SE=0.128, 95%CI [−0.824, −0.316]).
The results of this study suggest that in individuals with low salivary cortisol reactivity, coping strategies may enhance reactivity to pleasurable activities, potentially leading to a reduction in stress responses. Conversely, in individuals with high salivary cortisol reactivity, coping strategies may not directly influence reactivity to pleasurable activities, even when conducted. Future research should examine in detail the influence of salivary cortisol on cognitive processing.