条目的得分概率与潜在特质呈特定的回归关系，这些关系通常称为各种数学模型。

There is a certain regression between the score probability of an item and the latent trait, and the regressions are usually represented as mathematic models.

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条目的得分概率与潜在特质呈特定的回归关系，这些关系通常称为各种数学模型。

There is a certain regression between the score probability of an item and the latent trait, and the regressions are usually represented as mathematic models.

youdao