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Prediction of the similarity between the subjective report of substances and dreaming experiences of high lucidity, based on the similarity to LSD, plants of the Datura genus, PCP and MDMA (A) and to reports of barbiturates, cocaine, venlafaxine and Calea zacatechichi (B). Substances are represented with circles that are color-coded as in Figure 1. The inset shows the value of the Spearman's rank correlation coefficient (ρ).
