Combining multiple intelligence test scores (IQs) into a grand psychometrically sound estimate. Joel Schneider’s free on-line web app.

In an earlier post in March, I alerted readers to a new journal publication that presented a psychometrically sound rational and method for combining multiple intelligence test scores into a single grand estimate. Below is the formal APA reference: Go to link above for more info. Schneider, W. J., Reynolds, C. R., McGrew, K. S., & Salekin, K. L. (2026). Life-and-death psychometrics: Generalizable…