On which theory is this personality assessment based?
Just like tests such as the MBTI﻿ and Insights Discovery personality test﻿, the theory behind the 4-color model and the 16 personality types is based on the ideas of Carl Gustav Jung﻿﻿, while the short report of The Bridge Personality is based on the scientifically-valid Big Five model﻿. This report is comparable to tests such as the NEO PI﻿ and the 16PF (Sixteen Personality Factor Questionnaire-16PF﻿).