MaryMac Books


For more than 30 years ITD has been Australia’s leading training organization using Jung’s theory of Psychological Types and related instruments, including the MajorsPTITM and the Myers-Briggs Type Indicator (MBTI®) instrument.  We continue to provide high quality training and certification in psychological type theory and the application of type theory.

Please contact Mary McGuiness on 0417661104  if you have any questions.

Online Books


Ideal resource for introducing clients to type.     

Packed with information, including two pages 

about each type!    

RRP $13. Bulk discounts available. 

Written and published in Australia.


2020  Covid-19                                                                       

Due to social distancing recommendations during the covid-19 

pandemic ITD has temporarily suspended face to face workshops 

and certification programs. We expect to resume these later in 2020.

For now we are offering some VIRTUAL training and seminars.

In-house VIRTUAL training and consultations are also available.


Majors Personality Type Inventory Certification Program

Become certified to purchase and use this amazing instrument.

Next program:  August 17, 18, 19, 24 & 25

Saturday program:  September 19 & 26, October 3, 10, 17


Join us for a FREE VIRTUAL Seminar 

Behaviour of Leaders of Different Types under Extreme Stress .

August 12,     1.00pm - 2.30pm. 

Focus - What happens to leaders of different Types when under extreme stress?   

Join us for an informal discussion. Please register at least one week before.

To REGISTER ....Call  ITD  on 0417661104  or  EMAIL

You will receive an email confirmation and instructions on how to join the group.  





Check course details

for new

VIRTUAL training

in 2020

starting August, 2020


Contact ITD for details:




 Registration Form

 Book Order Form