Quantitative Aspects of Psychological Assessment
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This site is a professional development resource for psychologists. It provides information and training in psychometrics and psychological assessment:
  • A basic course and basic topics in applied psychometrics
  • A set of online calculators for psychologists to use
  • Online examination (you will receive a graduation certificate upon passing)
  • A large set of advanced Topics in psychological assessment and psychometrics
  • links to guidelines for conducting and reporting psychological assessment and other psychological assessment oriented Internet sites

Development of this site is by Dr Tony Florio and Prof Philip Ley, and funded by the NSW Psychologists Registration Board

If you have any queries, suggestions or otherwise want to contact us, please email

New July 2007 - Free Book on Psychometrics
The original edition of "Quantitative Aspects of Psychological Assessment" by Philip Ley is out of print. This 2007 edition is free and only avialable online at as a set of 14 PDF files. Go to Home on the menu at the top of this page, then go to Psychometrics Book 2007 edition .

Open each PDF and save it to your computer. Then you can read on screen or you can print out and bind the book. Read Prof Philip Ley's Introduction to the 2007 edition to see what is new and revised in the 2007 edition.

You need the free Adobe Reader to view information on this site

MAC Users
If you are having trouble accessing all the information on this site, MAC OS System 10 using Firefox with the PDF plugin is known to work

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