The Four Letters

Yes — completely. No signup, no paywall on your results, no upsell at the end. Every Wrenlight test is free, and your result feeds your evolving cross-test Portrait.

~7 min — 28 questions. Every question is scenario-based — real situations rather than abstract self-ratings — so it moves quickly.

4 dimensions — E vs I, N vs S, T vs F and J vs P — each measured by at least three differently-shaped questions, resolving into one of 16 types.

Each answer carries weights toward the dimensions; your 0–100 scores map to the closest of the 16 types, and borderline results are flagged as borderline rather than rounded into false confidence. Full details on the methodology page. How this is measured →