Summary of the 'new' study by Grotzinger et al
Well done. Conscientiousness also shows a suggestive negative relationship with the Compulsive (OCD / Anorexic) group here. Surprisingly given the charts Emil provided above, OCD seems also related to lower intelligence across many studies:
http://www.neuropsychopathology.com/uploads/4/6/0/4/46045287/abramovitch_et_al._2017_meta_analysis_iq_ocd.pdf
Though Anorexia is still associated with higher IQ, and this is probably able to drive the overall positive association with IQ (and education):
https://annals-general-psychiatry.biomedcentral.com/articles/10.1186/1744-859X-9-40
Well done. Conscientiousness also shows a suggestive negative relationship with the Compulsive (OCD / Anorexic) group here. Surprisingly given the charts Emil provided above, OCD seems also related to lower intelligence across many studies:
http://www.neuropsychopathology.com/uploads/4/6/0/4/46045287/abramovitch_et_al._2017_meta_analysis_iq_ocd.pdf
Though Anorexia is still associated with higher IQ, and this is probably able to drive the overall positive association with IQ (and education):
https://annals-general-psychiatry.biomedcentral.com/articles/10.1186/1744-859X-9-40