Kawachi Tatsuru, Kawachi Yousuke
Department of Psychology, Graduate School of Arts and Letters, Tohoku University, 27‑1, Kawauchi, Aoba‑ku, Sendai, 9808576, Japan.
Sci Rep. 2025 Jul 10;15(1):24956. doi: 10.1038/s41598-025-09850-x.
Previous studies have indicated that two-person judgments are more accurate than individual judgments in perceptual decision-making. Most studies have indicated that the improvement of performance accuracy reflects changes in visual sensitivity by using a bias-free paradigm to eliminate the effects of decision criteria. However, biases in judgment are natural during daily decision-making. Therefore, we should carefully consider the effect of response bias on two-person decision-making. Thus, this study investigated changes in two-person decision-making using signal detection theory. We conducted two experiments. The results of the two experiments revealed that not only does two-person judgment improve perceptual sensitivity but also shifts the decision criterion. This study provides new insights into response bias as a factor for better understanding two-person interactions.
先前的研究表明，在知觉决策中，两人判断比个人判断更准确。大多数研究表明，通过使用无偏差范式消除决策标准的影响，性能准确性的提高反映了视觉敏感性的变化。然而，在日常决策中，判断偏差是很自然的。因此，我们应该仔细考虑反应偏差对两人决策的影响。因此，本研究使用信号检测理论研究了两人决策的变化。我们进行了两个实验。这两个实验的结果表明，两人判断不仅提高了知觉敏感性，还改变了决策标准。本研究为反应偏差提供了新的见解，有助于更好地理解两人之间的互动。
