HosseinVerdi, Masoumeh, et al. “The Association Between Psychological Distress and Pain Perception in Patients With Irritable Bowel Syndrome: The Mediating Role of Behavioral Activation and Inhibition Systems”. International Journal of Education and Cognitive Sciences, vol. 7, no. 3, Sept. 2026, pp. 1-10, https://doi.org/10.61838/kman.ijecs.333.