因此在采用2级评分模型时双参数模型是最好的。

Therefore, the two-parameter logistic model was the best for 2-point scoring model.

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每一条目相当于一个有关症状，按1 ~ 4级评分。

Each item was equal to a relative symptom with 1-4 grade score.

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症状自评量表包含10个因子90个记录项目，采用5级评分法，分值越高越严重。

SCL-90 contained 10 factors and 90 items, 5 grades evaluation, the higher the score, the severe the disease was.

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