"Even infrequent [Ketamine] users—who used … roughly 3x/mth—scored higher on a delusional-thought scale than ex-users, ppl who took other drugs, & ppl who didn’t use drugs at all. Those who avg'd 20 uses/mth scored even higher. Ppl believed they were the sole recipients of secret messages, or that society & people around them were especially attuned to them. The psych. profile … was someone who … was 'distinctly dissociated in their day-to-day existence.'"