The following is excerpted from The Psychedelic Future of the Mind, published by Inner Traditions, Bear & Company.

Current research offers some tantalizing support for claims that psychedelics can be used to enhance cognition, improve intelligence, and strengthen cognitive studies.

Cognitive Enhancement

Experimental evidence of psychedelic cognitive enhancement comes from studies of practical problem solving, abstract concepts, and psychotherapy.

A significant instance of problem solving resulted in a Nobel Prize for Kary Mullis. Until the invention of the polymerase chain reaction (PCR), a common problem in biology was that biological samples were often too small to analyze, but Mullis solved that and won a Nobel Prize. He described how LSD aided him in doing so.

"PCR's another place where I was down there with the molecules when I discovered it and I wasn't stoned on LSD, but my mind by then had learned how to get down there. I could sit on a DNA molecule and watch the [indistinct] go by. . . . I've learned that partially I would think, and this is again my opinion, through psychedelic drugs . . . if I had not taken LSD ever would I have still been in PCR? I don't know, I doubt it, I seriously doubt it." (Mullis 1998; "Horizon: Psychedelic Science" 1997)

From the point of view of psychedelic cognitive studies, Mullis's example is noteworthy because he did not have his insight while taking psychedelics but instead used psychedelics to increase his ability to visualize, then transferred that cognitive skill back to his ordinary mindbody state. This confirms the idea that some skills learned in one state can be transferred to another. Transference and nontransference between mindbody states is itself a cognitive process that deserves study — learning to remember dreams, for example. Learning to increase this flow, if it is possible, would increase access to stores of information and possibly to new cognitive skills.

Unlike Mullis's experience of transferring a skill back to his ordinary state, most instances of psychedelic problem solving occur while the person's cognitive processes are psychedelically augmented. This is most clearly illustrated by "Psychedelic Agents in Creative Problem Solving: A Pilot Study," by Willis Harman, a professor of engineering economic systems, and a team of researchers at Stanford Research Institute. Working with twenty-seven men who were "engaged in various professional occupations, i.e., engineers, physicists, mathematicians, architects, a furniture designer, and a commercial artist and had a total of 44 professional problems they wanted to work on," the Stanford Research Institute team divided them into groups of three or four and gave them 200 milligrams of mescaline, followed by a quiet period of listening to music. Then they had snacks and discussed their problems with their group. Following this they spent three or four hours working alone on their problems.[
As a result of psychedelic enhancement, the practical results were impressive.
http://realitysandwich.c...nding_cognitive_studies/

Effects of psilocybin on hippocampal neurogenesis and extinction of trace fear conditioning.
Catlow BJ1, Song S, Paredes DA, Kirstein CL, Sanchez-Ramos J.
Author information
Abstract
Drugs that modulate serotonin (5-HT) synaptic concentrations impact neurogenesis and hippocampal (HPC)-dependent learning. The primary objective is to determine the extent to which psilocybin (PSOP) modulates neurogenesis and thereby affects acquisition and extinction of HPC-dependent trace fear conditioning. PSOP, the 5-HT2A agonist 25I-NBMeO and the 5-HT2A/C antagonist ketanserin were administered via an acute intraperitoneal injection to mice. Trace fear conditioning was measured as the amount of time spent immobile in the presence of the conditioned stimulus (CS, auditory tone), trace (silent interval) and post-trace interval over 10 trials. Extinction was determined by the number of trials required to resume mobility during CS, trace and post-trace when the shock was not delivered. Neurogenesis was determined by unbiased counts of cells in the dentate gyrus of the HPC birth-dated with BrdU co-expressing a neuronal marker. Mice treated with a range of doses of PSOP acquired a robust conditioned fear response. Mice injected with low doses of PSOP extinguished cued fear conditioning significantly more rapidly than high-dose PSOP or saline-treated mice. Injection of PSOP, 25I-NBMeO or ketanserin resulted in significant dose-dependent decreases in number of newborn neurons in hippocampus. At the low doses of PSOP that enhanced extinction, neurogenesis was not decreased, but rather tended toward an increase. Extinction of "fear conditioning" may be mediated by actions of the drugs at sites other than hippocampus such as the amygdala, which is known to mediate the perception of fear. Another caveat is that PSOP is not purely selective for 5-HT2A receptors. PSOP facilitates extinction of the classically conditioned fear response, and this, and similar agents, should be explored as potential treatments for post-traumatic stress disorder and related conditions. https://www.ncbi.nlm.nih.gov/pubmed/23727882

http://beckleyfoundation...-pau-research-programme/
study investigating the potential of ayahuasca to promote neurogenesis: the development of new brain cells

Psilocybin can occasion mystical-type experiences having substantial and sustained personal meaning and spiritual significance
https://www.ncbi.nlm.nih.gov/pubmed/16826400

http://psychedelic-infor...chedelic-Neuroplasticity