Klatt H J
Arch Psychiatr Nervenkr (1970). 1978 Aug 22;225(4):333-48. doi: 10.1007/BF00343305.
Definitions of anomia as a symptom of aphasia have been classified into three categories. Some frequently cited experimental studies designed to establish a rank order of difficulty for parts of speech (nouns, adjectives, verbs) have been briefly evaluated. An experiment has been conducted with 18 mild adult aphasics who were required to read lists of words which were controlled with respect to length, frequency of occurrence and part of speech. The results show that the linguistic category of part of speech has a highly significant influence on readability. Nouns are easier to read than adjectives and these easier than verbs. This finding does not necessarily contradict many definitions of anomia, though it calls into question the validity of many widely accepted interpretations. The results were explained in terms of phrase structure and dependence grammars.
将命名障碍定义为失语症的一种症状可分为三类。一些为确定词性（名词、形容词、动词）难度等级而设计的、经常被引用的实验研究已得到简要评估。对18名成年轻度失语症患者进行了一项实验，要求他们阅读在长度、出现频率和词性方面受到控制的单词列表。结果表明，词性这一语言类别对可读性有极显著影响。名词比形容词更容易阅读，而形容词又比动词更容易阅读。这一发现不一定与许多命名障碍的定义相矛盾，尽管它对许多被广泛接受的解释的有效性提出了质疑。结果从短语结构和依存语法的角度进行了解释。
