The MBTI® instrument demonstrates some of the highest levels of consistency and reliability of any personality assessment product. Many years of rigorous testing and use of the most up-to-date psychometric tools, such as item response theory (IRT) for both scoring and item selection, ensures that all MBTI® forms are of the highest quality and value.
The MBTI® Manual contains more than 400 pages of technical and statistical data on the construction and reliability of the MBTI® instrument.
We are also pleased to be able to bring to you these newly released Technical Briefs for MBTI® Form M and Form Q Assessments with Singapore, Malaysia, Indonesia and Mongolia samples. The Technical Briefs summarise the measurement properties of both the MBTI® Form M and Form Q, examining the reliability; reporting on type distribution, and providing comparisons with the US National Representative Sample (NRS)