ViVIM-VR: Visual Imagery Vividness Matching in Virtual Reality

Vividness of mental imagery is central to cognition, yet existing tools collapse its complexity into a single questionnaire score. ViVIM-VR is an immersive psychophysical paradigm — a “microscope for the imagination” — in which participants co-construct a virtual scene by adjusting 14 real-time faders (brightness, contrast, depth, embodiment, sound clarity, and more) until the VR environment matches their inner mental image. High-precision eye-tracking provides a second, implicit layer of measurement. The goal is to empirically map the full dimensional structure of imaginative experience, testing whether vividness is bidimensional (Intensity vs. Specificity), supramodal across visual and auditory parameters, and modulated by emotional valence. N=80 in-person participants; pre-registered (IRB 2025.235).