Personal intelligence involves the capacity to reason about personality and personality-relevant information. People high in personal intelligence are good at understanding themselves and others. The UNH Personality Lab developed a series of ability-based tests that assess this skill, under the name of the Test of Personal Intelligence (TOPI).
Mayer, J. D., Caruso, D R. & Panter, A. T. (2014). Test of Personal Intelligence 1.4 (TOPI 1.4) Manual.