The j vs p dichotomy refers to whether the dominant process in a process pair is judging (Fi Fe Ti or Te) or perceiving (Ni Ne Si or Se.)
Examples of j types, with the corresponding process pair in parentheses and the corresponding Socionics type after the colon:
- INFP (FiNe): INFj
- ENTJ (TeNi): ENTj
- ISTP (TiSe): ISTj
- ESFJ (FeSi): ESFj
Examples of p types:
- INFJ (NiFe): INFp
- ENFP (NeFi): ENFp
- ISTJ (SiTe): ISTp
- ESFP (SeFi): ESFp
Background Info
This dichotomy was made popular by Socionics, which uses it in place of the Myers-Briggs (uppercase) J vs P dichotomy.