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About ITD 

The Institute for Type Development (ITD) was established in 1986 to promote understanding of Jung’s Theory of Psychological Types and the responsible use of the Myers Briggs Type Indicator® (MBTI®). From 1986 to 2008 ITD was Australia’s leading provider of training and resources for Psychological Types and the MBTI®. In recent years ITD has added several new instruments, including the Majors Personality Type Inventory™, MajorsPT Elements™ (StepII). and the ARSENAL.

The founding Principal of ITD, Mary McGuiness, is one of Australia’s most experienced type practitioners, with twenty two years experience presenting MBTI Instrument Qualifying Programmes in Australia and fifteen years presenting the  MajorsPTI Certification.

ITD's Services Include:

In-house training and Consulting

We can design workshops and training for your organisation focusing on a variety of topics including:


The Myers-Briggs Type Indicator® and MBTI® are registered trade marks of The Myers-Briggs Type Indicator trust in the USA and other countries. 

The Majors Personality Type Inventory  and the MajorsPT-Elements are registered trademarks of Mark Majors.

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