The 1.41 million respondent Ethos-1.4M Baseline dataset represents one of the largest continuous web assessments of human personality ever recorded using the 120-item IPIP-NEO psychometric standard. Spanning 13 years from 2011 through 2023, it offers an unprecedented lens into how population-level personality traits shifted before, during, and after the global COVID-19 pandemic.

Annual Big Five Averages (2011–2023)

Year	Submissions (N)	Openness	Conscientiousness	Extraversion	Agreeableness	Neuroticism
2011	19,511	81.68	89.34	82.5	88.99	66.45
2012	30,794	81.16	88.93	82.49	88.47	66.81
2013	31,533	81.12	89.02	82.45	88.76	66.86
2014	38,665	81.82	88.4	81.19	88.84	68.23
2015	75,920	83.7	86.48	78.18	87.47	70.14
2016	304,376	84.5	82.11	73.76	86.54	78.51
2017	149,790	84.04	86.12	77.95	87.99	71.6
2018	188,429	84.3	85.85	77.29	88	71.69
2019	131,893	83.23	86.91	78.43	88.96	71.24
2020	118,277	83.53	86.97	78.43	88.99	71.64
2021	116,487	83.15	87.12	78.19	89.03	71.81
2022	128,950	82.87	86.68	77.94	88.51	72.09
2023	75,927	82.85	86.92	77.48	88.32	72

Key Takeaways from the Data

Neuroticism Trends: Population anxiety and vulnerability reached noticeable peaks during 2016–2017 and remained elevated through the 2020–2021 pandemic period.
Extraversion & Social Activity: Gregariousness (`e2`) and excitement-seeking (`e5`) showed slight decreases during isolation periods.
Consistency Across Sample Sizes: Despite major fluctuations in annual submission volumes (peaking at 304,000 in 2016), population averages remained remarkably stable, demonstrating high psychometric reliability.

Annual Big Five Averages (2011–2023)

Year	Submissions (N)	Openness	Conscientiousness	Extraversion	Agreeableness	Neuroticism
2011	19,511	81.68	89.34	82.5	88.99	66.45
2012	30,794	81.16	88.93	82.49	88.47	66.81
2013	31,533	81.12	89.02	82.45	88.76	66.86
2014	38,665	81.82	88.4	81.19	88.84	68.23
2015	75,920	83.7	86.48	78.18	87.47	70.14
2016	304,376	84.5	82.11	73.76	86.54	78.51
2017	149,790	84.04	86.12	77.95	87.99	71.6
2018	188,429	84.3	85.85	77.29	88	71.69
2019	131,893	83.23	86.91	78.43	88.96	71.24
2020	118,277	83.53	86.97	78.43	88.99	71.64
2021	116,487	83.15	87.12	78.19	89.03	71.81
2022	128,950	82.87	86.68	77.94	88.51	72.09
2023	75,927	82.85	86.92	77.48	88.32	72

Key Takeaways from the Data

Neuroticism Trends: Population anxiety and vulnerability reached noticeable peaks during 2016–2017 and remained elevated through the 2020–2021 pandemic period.
Extraversion & Social Activity: Gregariousness (`e2`) and excitement-seeking (`e5`) showed slight decreases during isolation periods.
Consistency Across Sample Sizes: Despite major fluctuations in annual submission volumes (peaking at 304,000 in 2016), population averages remained remarkably stable, demonstrating high psychometric reliability.

The 12-Year Personality ShiftPopulation Trajectory Trends (2011–2023)

Annual Big Five Averages (2011–2023)

Key Takeaways from the Data

The 12-Year Personality ShiftPopulation Trajectory Trends (2011–2023)

Annual Big Five Averages (2011–2023)

Key Takeaways from the Data