Development and preliminary validation of the visual method ‘3D emotion composition’ for evaluating emotional experience in depression

These findings provide preliminary evidence for the validity of 3DEC as a visual, tangible, and interactive tool for assessing emotional experience in individuals with depression. By capturing aspects of emotional intensity, frequency, and regulation beyond traditional self-report measures, 3DEC may offer valuable insights into emotional processing. Future studies should evaluate its test-retest reliability, sensitivity to therapeutic change, and potential applications in clinical interventions.