Published by McGraw-Hill, this edition laid the groundwork. It was revolutionary for its emphasis on construct validity over simple criterion validity. However, it predates the widespread adoption of Cronbach’s alpha as we know it today.
Strengths:
Limitations:
Before SPSS had a "Factor" button, Nunnally explained communality, eigenvalues, and rotation (orthogonal vs. oblique). His caution about over-extraction of factors remains a lesson for modern data scientists. psychometric theory nunnally pdf