Psychometric Theory by Jum C. Nunnally (later co-authored with Ira H. Bernstein) is considered the "classic text" and gold standard for measurement in behavioral sciences. Originally published in 1967, it provides a comprehensive foundation for psychological testing, scaling, and statistical analysis. Springer Nature Link Core Content & Framework
Here is the ethical reality. Nunnally’s book is copyrighted by McGraw-Hill (and later by the estate of Bernstein). While sites like "Library Genesis" or "Z-Library" often host pirated copies, accessing them: psychometric theory nunnally pdf
after Nunnally's death. It introduced modern procedures like Confirmatory Factor Analysis (CFA) Psychometric Theory by Jum C
Conclusion
Understanding Psychometric Theory: A Comprehensive Guide to Nunnally's Concepts and PDF Resources Factor Analysis: