11D-ASC

The Eleven Dimensions of Altered States of Consciousness (11D-ASC) is an updated factorial structure derived from the same 94 visual analog scale items as the 5D-ASC. Proposed by Erich Studerus and colleagues through confirmatory factor analysis, the 11 dimensions provide more differentiated subscales: Experience of Unity, Spiritual Experience, Blissful State, Insightfulness, Disembodiment, Impaired Control and Cognition, Anxiety, Complex Imagery, Elementary Imagery, Audio-Visual Synesthesia, and Changed Meaning of Percepts. This finer-grained structure better captures the multidimensional nature of psychedelic experiences and allows researchers to correlate specific experiential dimensions with therapeutic outcomes. The 11D-ASC is increasingly preferred over the original 5D structure in modern psychedelic clinical trials because it separates positive mystical elements from perceptual phenomena and differentiates anxiety from cognitive impairment.