From Dan Schawbel: There are four basic Keirsey Tempera­ments — SJ, SP, NT, NF — created by psychol­o­gist David Keirsey, who built on the work of the Myers-Briggs Type Indi­cator (MBTI). S stands for sensing, and the S’s are usually “concrete” in their approach. They concern them­selves with things they can see, hear, feel, taste, and smell. N is for intu­itive, and they focus on things they can imagine or things that could be. J and P refer to judging and perceiving, while T and F refer to thinking and feeling. · Go to Spot­ting Keirsey/Myers-Briggs tempera­ments at a glance →