The definition of personality traits is constantly changing

One study found that nearly half of people who take the Myers-Briggs a second time only five weeks after the first get assigned a different type.And other studies on the Myers-Briggs have found that people with very similar scores end up being placed in different categories,suggesting that the strict divisions between personality types don't reflect real-life nuances.Complicating matters further,the definitions of personality traits are constantly shifting.The Swiss psychiatrist Carl Jung,who popularized the terms introvert and extrovert,defined an introvert as someone who sticks to their principles regardless of situation,and an extrovert as someone who molds their self according to circumstance.