The author introduces process, designs, models, hypotheses, and estimated variance component of Generalizability Theory (GT) at length on the basis of three kinds of educational test theories.

• 本文在简要回顾三大测量理论的基础上，较详细的阐述了概化理论（GT）的步骤、设计方案、模型和假设、方差分量估计等。