Raffin M J, Davis J M, Gilman L A
J Speech Hear Res. 1978 Jun;21(2):387-400. doi: 10.1044/jshr.2102.387.
A test of morpheme-based concepts was administered to 67 deaf children who were exposed to Seeing Essential English (SEE). Results indicated that these children show the following order of acquisition for the inflectional morphemes tested: plural -s, past tense -ed, present progressive -ing, possessive -'s, third person present indicative -s, comparative -er, superlative -est, and present perfect -en. There were no effects of sex, age, or school from which the subjects were selected. The main contribution to the subjects' performances were their lengths of exposure to SEE.
对67名接触过视读基础英语（SEE）的失聪儿童进行了一项基于词素概念的测试。结果表明，这些儿童在测试的屈折词素习得顺序如下：复数-s、过去式-ed、现在进行时-ing、所有格-'s、第三人称现在陈述式-s、比较级-er、最高级-est和现在完成时-en。受试者的性别、年龄或所在学校没有产生影响。对受试者表现的主要影响因素是他们接触SEE的时长。
