SPEECH PERCEPTION AND PRODUCTION IN AN EPISODIC LEXICON

描述（改编自研究者摘要）：本研究 项目研究长期记忆中的词汇表征， 访问这些表示的进程。 大多数理论认为， 语音波形被转换成音素串 与心理词典相比。 当比较产生匹配时， 一个词是“认识”。 这种典型的观点强调抽象 字的属性。 一种含有特殊音质的语音信号 信息（说话者的声音、环境噪声等）转换为 一系列的理想，抽象的音素，这是用来访问理想， 抽象的词语 很少有理论认为言语的特质 信号中的“噪音”。 然而，多轨迹记忆模型 知觉经验的细节不会被遗忘;相反，它们 对后来的认知是不可或缺的。 这项研究将测试一个 心理词典的多轨迹模型，使用言语感知和 记忆数据（项目1），和语音生产数据，从一本小说 阴影范例（项目2）。 初步研究和试点 Hintzman（1986）MINERVA 2模型的模拟已经产生了 令人鼓舞的结果。 研究人员计划测试预测的 现有模型的限制，并测试修饰版本， 必要 在项目1中，感知和记忆实验将测试 情节记忆痕迹的细节和持久性 在口语单词识别方面，并将仔细评估 记忆和感知的能力。 在项目2中，该模型针对 来自单字阴影任务的语音产生数据。 典型的 跟踪中的依赖措施是响应时间;另一种选择，很少- 所采用的测量标准是学生语音的声学-语音内容 应答 项目2将研究语音声学在 一个字的影子 学生将产生影子的刺激词 包括男性和女性。

DESCRIPTION (Adapted from the Investigator's Abstract): This research project investigates lexical representations in long-term memory and the processes that access those representations. Most theories assume that the speech wave form is converted to a string of phonemes which is then compared to the mental lexicon. When comparison yields a match, the word is "recognized". This typical view emphasizes the abstract properties of words. A speech signal containing idiosyncratic information (speaker's voice, ambient noise, etc.) is converted to a sequence of ideal, abstract phonemes, which is used to access ideal, abstract words. Few theories consider idiosyncracies of speech as more than "noise" in the signal. However, multiple-trace memory models posit that details of perceptual experience are not forgotten; instead, they are integral to later perception. The proposed research will test a multiple-trace model of the mental lexicon, using speech perception and memory data (Project 1), and speech production data from a novel shadowing paradigm (Project 2). Preliminary research and pilot simulations of Hintzman's (1986) MINERVA 2 model have already produced encouraging results. The investigators plan to test the predictive limits of the extant model, and to test embellished versions as necessary. In Project 1, perception and memory experiments will test the level of detail and the durability of episodic memory traces produced in spoken word recognition, and will carefully assess the relationship of memory and perception. In Project 2, the model is tested against speech production data from a single-word shadowing task. The typical dependent measure in shadowing is response time; an alternative, rarely- used measure is the acoustic-phonetic content of the Ss' speech responses. Project 2 will examine changes in speech acoustics during single-word shadowing. Stimulus words for Ss to shadow will be produced by multiple speakers, including males and females.