The article hyperlinked below outlines the Reflective Judgment model; defines the seven stages; notes the basis for their articulation as developmental process; flags intrinsic and extrinsic limitations; and ponders the relationship between cognitive development, leader development, and organization-wide learning.
Article The Reflective Judgment Model: What Role in Leader Development?
Once again I am attaching some great links covering your topic, hope this helps, cheers.
Kind regards,
Sofiane
1. Being Smart Is Not Enough: Personality Traits and Vocational Interests Incrementally Predict Intention, Status and Success of Leaders and Entrepreneurs Beyond Cognitive Ability - S Bergner - Frontiers in psychology, 2020 - frontiersin.org
Leadership Positions can be done by people who are developed to be Leaders. They need to serve as a Leadership and nowadays it is Servant Leadership. Look at the Geopolitical state of affairs, A leader apart from cognitive skills needs to be aware and should have a Strength-based approach rather than fixing the weakness.
Leadership positions require cognitive conceptual skills, emotional intelligence, a reasonable degree of general intelligence, and specific intelligences/skills related to the job.