About the free test
How the OnType test works
The OnType test looks at eight cognitive functions: four ways of taking in information and four ways of making decisions. Within this model, your type is the arrangement of those functions that fits your answers best. Here is how it gets there.
It compares true opposites
Each question weighs one function against its true opposite, such as Introverted Intuition against Introverted Sensing, or Extraverted Thinking against Extraverted Feeling. It never asks you to choose between a way of taking in information and a way of deciding, because a person can use both at once. When an answer leans toward one side, the other side moves down by the same amount.
It asks what you lean on first
Some questions compare two functions that a type can use together, such as Introverted Intuition and Extraverted Sensing. These questions are about order, not exclusion. The order separates types that share the same four functions, for example INFJ, ENFJ, ISTP, and ESTP.
Introversion and extraversion come from the pattern
There are no questions about people, socialising, or how outgoing you feel. Within this model, introversion and extraversion describe the direction of your first move: inward to your own reference, or outward to what is in front of you. The test reads that from the size of the gaps between your function scores, with a small, deliberately weak check for people who answer every question at the extremes.
Your type is the closest fit
Your scores are compared with sixteen type profiles, and the closest one becomes your result. The function order you see is always that type's own order, never a simple sort of your raw scores, so it cannot show a combination the model does not allow.
What it is, and what it is not
This is a model of how attention and judgment tend to work, not a clinical assessment. Read your result as a starting point, notice what fits your own experience, and keep what is useful.