This issue is in progress but contains articles that are final and fully citable. Printer-friendly version Measuring psychological inflexibility in educational settings: Development and validation of the KIBS-Ed with a psychotherapy training sample Heterogeneity in the links of psychological (in)flexibility subprocesses and well-being: Idionomic insights from an experience sampling study Book traversal links for Volume 40 (April 2026) Submitting an article to JCBS Up Measuring psychological inflexibility in educational settings: Development and validation of the KIBS-Ed with a psychotherapy training sample