Duplicate coding of verbal autopsy results has little advantage over a single-coder system for mortality surveillance or for identifying population patterns of death.

进行死亡率监测或确认人口死亡类型时，死因推断结果的双重编码与单个编码员系统相比优势较小。

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This paper introduces a new cognitive theory-Dual Coding Theory, which hypothesizes the use of two representational systems-one verbal, the other non-verbal, in the process of reading.

双重代码理论认为，我们在阅读时使用语言和非语言两套表现系统。

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