However, their flagship measure is the MTQ range of psychometric assessments (principally MTQ 4C’s – a standard measure of mental toughness, and MTQ Plus the premium measure of mental toughness) based on Clough’s 4C’s framework of mental toughness, universally acknowledged as the leading measure of mental toughness.

Developed in 2002 as the MTQ 48 and upgraded in 2018 to the MTQ Plus, over 75% of all independent research into mental toughness uses the MTQ Plus with over 280 independent peer review studies reinforcing its evidenced based reliability and validity.

The framework and assessment is now used in over 80 countries globally through fourteen different languages.

AQR CEO Doug Strycharczyk , Technical Director , Professor Peter Clough and Product Development Director , Dr John Perry are three of the leading experts in mental toughness globally , publishing regular blogs insights and commentary.

Although ‘Everything Mental Toughness’ is an independent resource designed to ‘inform and educate ‘around everything mental toughness, we acknowledge the wealth of AQR’s expertise and indeed many of our articles and resources relate to the 4C’s mental toughness framework originally developed by Prof Petr Clough and his team and commercialised and upgraded by Clough, Strycharczyk and Perry.

Indeed, their best-selling book Developing Mental Toughness   is the leading instructive book about the concept of mental toughness.

You can find out more here about AQR International.