The above responses derive from interviews conducted with participants who experienced a preliminary experimental prototype of Just Noticeable Diff erence (JND), an artistic installation-environment in development between 2009 and 2010 that combines near darkness with sound, tactile vibration and color-changing light operating at diff erent perceptual thresholds. While the title JND fi rst evokes Gustav Fechner’s nineteenth century invention of and research into psychophysics and, in particular, his experiments aimed at logarithmically quantifying the limens of sensation, the project seeks to explore the phenomenological shifts occurring in the embodied experience of self and environment. More specifi cally, the project researches the process of embodied meaning making taking place inside a physical space in which a variety of cross-modal stimuli operate at varying just noticeable diff erences of sensory intensity.