The J-P dichotomy is about how we prefer to live our lives and is the one scale that can change through choice (although we will each have a natural predilection for one or the other). This is not one of the scales developed by Jung in his book, ‘Psychological Types’ but was added later, in 1941 by the mother and daughter Katharine Cook Briggs and Isabel Briggs Myers.
Judging types prefer a planned, ordered world where things are organised and scheduled and they look to get to closure on issues as they tend to dislike loose ends. They also tend to finish one job before they start the next and are keen to have order.
Perceiving types are more flexible, spontaneous and almost get a kick out of last minute hitches or problems. They dislike routine and prefer to keep their options open seeing planning as stifling and plans as there to be changed.