ISTJ Main Page

This page details the key traits and characteristics of the ISTJ personality type, as well as their personality preferences and functions. It also contains important ISTJ tools and resources […]

ISTJ Type Profile

ISTJs are among the most loyal, dutiful, and responsible of the types. They make loyal friends and companions and are admired for their devotion, steadfastness, and perseverance […]

ISTJ Careers, Jobs & Majors

There are plenty of great job and career choices for ISTJs that we will explore throughout this post. […]

Introverted Sensing (Si): The Inner Life of ISTJ & ISFJ Types

I’ve already written a fair amount about Introverted Sensing (Si), both on Personality Junkie and in my books. But having recently revisited Lenore Thomson’s book, Personality […]

INFJ, INTJ, ISFJ & ISTJ Types: Similarities, Differences & the Brain

What do introverts (I) and judging (J) types have in common? For starters, both tend to be reflective and deliberative, taking care to “look before they […]