Author, editor and psychometric consultant

I am a psychologist by background, and my consultancy focuses on the design, development and/or evaluation of psychological scales and tests – mainly those measuring personality, cognitive abilities and intelligence. Most clients are in the occupational (i/o) area. Though I am based in London, Ontario, Canada I am pleased to offer my services to clients worldwide. However I do not assess individuals.
I also write award-winning books on individual differences, human intelligence and their assessment, was President of the International Society for the Study of Individual Differences (2021-2023) and am an editor-in-chief of the journal Personality and Individual Differences. The image shows the cover of the 5th edition of one of my books, to be published by Routledge in 2026 or 2027.
I also offer assistance with the development of learning materials (at university level) for courses in personality, intelligence, psychometric theory and statistics – either for distance-learning, or as lecture content.
Stop Press: I‘ve just discovered a review of my book “An Introduction ro Psychometrics and Psychological Assessment” in the journal Psychometrika. As this is the leading journal in the field, I was apprehensive – but the book was very well regarded. Click here to read the review.