Productive vocabulary across discourse types
Productive vocabulary across discourse types
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DOI：
10.1080/02687038.2011.606974
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发表时间：
2011-01-01
期刊：
影响因子：
2
通讯作者：
Capilouto, Gilson J.
中科院分区：
文献类型：
--
作者：
Fergadiotis, Gerasimos;Wright, Heather Harris;Capilouto, Gilson J.
目的：本研究的目的是：(a)通过测试四种语篇任务（程序、事件广播、讲故事和叙述）所引出的语言样本之间是否存在显著差异，考察语篇类型对词汇多样性的影响；(b)评估在引出不同类型话语时，年龄对词汇多样性的影响程度。方法与程序：共有86名认知健康的成年人参加了这项研究，分为两组：年轻人（20-29岁）和老年人（70-89岁）。参与者完成话语任务，他们的语言样本使用专用软件（voc-D）进行分析，以获得他们的词汇多样性估计。结果和结果：进行了2 × 4方差分析，然后进行了简单主效应的调查。在两个年龄组中建立了相似的词汇多样性层次结构。该研究还揭示了与年龄相关的差异，这种差异在口头呈现刺激时很明显，但在使用图像刺激引出语言样本时却被消除了。结论：研究结果表明，词汇多样性是受话语类型和年龄影响的微语言指标之一，这一发现具有重要的方法论意义。未来的研究需要探索神经源性语言障碍患者的词汇多样性模式，并评估词汇多样性测量的临床效用。
Aims: The goals of the study were (a) to examine the effect of discourse type on lexical diversity by testing whether there are significant differences among language samples elicited using four discourse tasks (procedures, eventcasts, story telling, and recounts); and (b) to assess the extent to which age influences lexical diversity when different types of discourse are elicited.Methods & Procedures: A total of 86 cognitively healthy adults participated in the study and comprised two groups - young adults (20-29 years old) and older adults (70-89 years old). Participants completed the discourse tasks and their language samples were analysed using dedicated software (voc-D) to obtain estimates of their lexical diversity.Outcomes & Results: Amixed 2 x 4 ANOVA was conducted and followed by an investigation of simple main effects. A lexical diversity hierarchy was established that was similar for both age groups. The study also uncovered age-related differences that were evident when the stimuli were verbally presented but were eliminated when the language samples were elicited using pictorial stimuli.Conclusions: Results indicated that lexical diversity is one of the microlinguistic indices that are influenced by discourse type and age, a finding that carries important methodological implications. Future investigations are warranted to explore the patterns of lexical diversity in individuals with neurogenic language disorders and assess the clinical utility of measures of lexical diversity.