SPEECH PERCEPTION AND PRODUCTION IN AN EPISODIC LEXICON

描述(改编自《调查者摘要》)：这项研究 该项目研究了长时记忆中的词汇表征以及 访问这些表示的进程。大多数理论都假设 语音波形被转换成音素串，然后 与心理词典相比。当比较结果为匹配时， 这个词是“被认可的”。这种典型的观点强调抽象 词语的属性。一种含有特质的语音信号 信息(说话者的声音、环境噪音等)被转换为 理想化的抽象音素序列，用于访问理想化， 抽象的词语。很少有理论认为言语的特质比 而不是信号中的“噪音”。然而，多踪迹记忆模型假设 知觉经验的细节不会被忘记；相反，它们 对后来的认知来说是不可或缺的。这项拟议的研究将测试一个 心理词典的多踪迹模型，使用语音感知和 记忆数据(项目1)，以及来自小说的语音产生数据 影子范例(项目2)。前期研究和试点 Hintzman(1986)Minerva 2模型的模拟已经产生 成绩令人鼓舞。调查人员计划测试这一预测 现有模型的限制，并测试修饰后的版本 这是必要的。在项目1中，感知和记忆实验将测试 情节记忆痕迹的细节水平和持久性 在口语识别方面，并会仔细评估这一关系 记忆和知觉。在项目2中，对模型进行了测试 来自单字跟踪任务的语音产生数据。典型的 跟踪中依赖的衡量标准是响应时间；另一种很少使用的替代方法是- 所用的量词是学生言语的声学内容 回应。项目2将检查语音声学方面的变化 单字阴影。将产生学生对影子的刺激词 包括男性和女性在内的多名演讲者。

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.