Hi, a observation I have on ISTj's Se is their reading ability of people's move which is concrete and tangible and can associate it with their intention. They seem to read me very well, each physical moves that I've made, they have read it successfully and what my true intention was. Maybe because I'm their dual or other Se' ego would also likely to be able to read their dual partner just as easily.
Any ISTj wants to comment on this, or someone who has noticed this ability in ISTj should share it.