Rosner B S
J Acoust Soc Am. 1984 Apr;75(4):1231-42. doi: 10.1121/1.390775.
An absolute identification task and various discrimination tasks were performed on synthetic syllables initiated by alveolar stops varying in voice-onset-time (VOT). Signal detection analyses of the data yielded three main findings. First, discrimination d's exceeded those for absolute identification. Greater instability of judgment in the latter than in the former task explained this difference. Second, stimuli within a phonetic category were discriminable, even in a delayed 2IAX paradigm with 4s between stimuli. Third, a category boundary effect appeared: identification and discrimination d's were largest around the voiced/voiceless boundary for alveolar stops. The relationship between discrimination and identification d's varies with response constraints, the number of just noticeable differences in the stimulus array, and stability of judgments in the various tasks. Nearly equal performance in discrimination and identification tasks is not a sufficient condition for a category boundary effect to occur. Several arguments are advanced against a dual-coding model. A continuous model which invokes only a single decision process may account more gracefully for the relationship between identification and discrimination of both consonants and vowels.
对由声门起始时间（VOT）不同的齿龈塞音引发的合成音节进行了绝对识别任务和各种辨别任务。对数据的信号检测分析得出了三个主要发现。首先，辨别d值超过了绝对识别的d值。后者判断的更大不稳定性比前者任务解释了这种差异。其次，即使在刺激之间间隔4秒的延迟2IAX范式中，语音类别内的刺激也是可辨别的。第三，出现了类别边界效应：对于齿龈塞音，在浊音/清音边界附近，识别和辨别d值最大。辨别和识别d值之间的关系随反应限制、刺激阵列中刚好可察觉差异的数量以及各种任务中判断的稳定性而变化。辨别和识别任务中近乎相等的表现不是类别边界效应出现的充分条件。提出了几个反对双重编码模型的论据。一个仅调用单个决策过程的连续模型可能更合理地解释辅音和元音的识别与辨别之间的关系。
