在PSC(普通话水平测试 )中 ,单字试题的出错率总是高于词语试题。本文为此作了一次随机调查 ,对调查材料的统计分析表明 ,单字试题中语素字的出错率大约是词字的 2倍。这是由于语素字在人们的日常口语和诵读中几乎从不单独说出 ,在没有上下文提示 ,即语素字不放在词语里的情况下 ,应试者容易误认和错认。这类错误的发生与普通话水平无关 ,因此单字试题中的语素字影响了PSC的目标 In PSC (Putonghua proficiency test), the error rate of a single word test is always higher than that of a word test. This article made a random survey, the statistical analysis of the survey material shows that the error rate of morpheme words in the word test is about twice the word. This is because the morpheme word is rarely spoken in everyday oral and recitation of the people. In the absence of the contextual prompt that the morpheme word is not placed in the word, the candidate is easily mistaken and mistaken. The occurrence of such errors has nothing to do with mandarin, so the morpheme word in the word test affects the PSC’s goal