Testing must have the quality of validity and reliability so as to have the objective evaluation on learners' ability and check the teaching result effectively.

测试应具备有效性和可靠性才能达到客观评价学习者能力和检验教学结果的目的。

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Objective: to study the effect of psoriasis on the patients life quality and to evaluate the reliability of dermatology life quality index (DLQI) as a new severity and therapeutic index of psoriasis.

目的：研究银屑病对患者生活质量的影响及皮肤病生活质量指数(DLQI)作为判断银屑病病情及疗效新指标的可信性。

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Objective To evaluate the reliability and structure validity of the Chinese quality of life instruments for cancer patients-head and neck cancer (QLICP-HN) by multi-factor analysis.

目的对中国版头颈癌生命质量测定量表（QLICP-HN）的信度与结构效度进行评价。

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