Big Five data from the World Values Survey is super-problematic (e.g. negative inter-item correlations): https://www.researchgate.net/profile/Steven_Ludeke/publication/315377692_Problems_with_the_Big_Five_assessment_in_the_World_Values_Survey/links/58cd8bff4585157b6dae679f/Problems-with-the-Big-Five-assessment-in-the-World-Values-Survey.pdf?_iepl%5BviewId%5D=gUaxx83RnIutZXyTSabMKdW4&_iepl%5BprofilePublicationItemVariant%5D=default&_iepl%5Bcontexts%5D%5B0%5D=prfpi&_iepl%5BinteractionType%5D=publicationDownload …
It's maybe related to the response biases in the data. See:https://www.researchgate.net/publication/222874232_Are_acquiescent_and_extreme_response_styles_related_to_low_intelligence_and_education …
