The Revised NEO Personality Inventory (NEO-PI-R) s a personality inventory that examines a person’s Big Five personality traits which include extraversion, agreeableness, openness to experience, conscientiousness, and neuroticism. The NEO-PI-R also reports on six subcategories of each Big Five personality trait.
The NEO-PI-R is self-administered and consists of 240 items.
Active? Yes
First used: 01 January 1992
Related Topic
PersonalityAt the simplest level, personality entails the characteristic patterns of thoughts, feelings and behaviours that make a person unique. Personality is ever-changing and it is believed that psychedelics have the ability to influence these changes.
Related Papers
Therapeutic effect of increased openness: investigating mechanism of action in MDMA-assisted psychotherapyThis follow-up study (n=20) finds that Openness (but not Neuroticism) plays a moderating role in the relationship between PTSD reduction following MDMA-assisted psychotherapy treatment.
Effects of psilocybin therapy on personality structure
This open-label study (n=20) found that dosages of psilocybin (10, 25mg) in a supportive setting, for those with treatment-resistant depression (TRD), changed their personality. At 3-month follow-up, Neuroticism was decreased, Extraversion and Openness were increased. The changes were similar (but more pronounced) to changes after conventional antidepressant treatment.
LSD-induced entropic brain activity predicts subsequent personality change
This counterbalanced, placebo‐controlled within-subjects study (n=19) investigated whether the combination of administering LSD (75µg/70kg) while listening to music can induce changes in entropic brain activity during resting state, and cause subsequent changes in personality structure. Results indicated that acute increases in brain entropy affecting the disintegration of functional connectivity within sensory and higher-order networks were predictive of subsequent increases in trait openness measured two weeks later. This relationship was enhanced by listening to music.
Mystical experiences occasioned by the hallucinogen psilocybin lead to increases in the personality domain of openness
This re-analysis from two psilocybin trials with hallucinogen-naïve subjects (n=52) looked at personality changes in participants. It found significant increases in openness (but not neuroticism, extroversion, agreeableness, and conscientiousness), which remained higher than baseline for those who had a mystical experience up to a year.
The paradoxical psychological effects of lysergic acid diethylamide (LSD)
This double-blind, placebo-controlled study (n=20) found that LSD (75µg) acutely heightened mood and psychosis-like symptoms. At the two-week follow-up, participants reported increased optimism and the trait openness.
A single psilocybin dose is associated with long-term increased mindfulness, preceded by a proportional change in neocortical 5-HT2A receptor binding
This open-label study (n=10) found a significant increase in mindfulness (MAAS) and openness (NEO PI-R) after a single high dose (14-21mg) of psilocybin.