Processing the temporal configuration of discrete sounds to extract a regular pattern is fundamental to humans' faculties of perceiving words and musical phrases. To investigate such auditory pattern perception in monkeys, I trained two common marmosets to discriminate between AB-AB and AA-BB patterns under two training paradigms. One was an absolute discrimination task, in which the discrimination between these stimuli without reference cues was required. The other was a relative discrimination task, in which the detection of a change from one stimulus to the other was required. The marmosets failed in the absolute discrimination task but achieved the relative discrimination task. Failure in the absolute task indicated that the marmosets were unable to form a representation of the global sound patterns in their long-term memory stores. In contrast, success in the relative task indicated that the marmosets had short-term memory of ongoing sounds that enabled an online monitoring to detect deviations between incoming sounds and the anticipated upcoming sounds. Thus, the current findings imply that marmosets can at least perceive adjacent tone relations in an auditory stream regardless of the temporal configuration of the global sound patterns.

中文翻译：

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普通狨猴（Callithrix jacchus）无法识别声音模式的全局配置，但可以识别声音的相邻关系

处理离散声音的时间配置以提取规则模式是人类感知单词和乐句的能力的基础。为了研究猴子的这种听觉模式感知，我训练了两种常见的狨猴，以在两种训练范式下区分 AB-AB 和 AA-BB 模式。一个是绝对区分任务，其中需要在没有参考线索的情况下区分这些刺激。另一项是相对辨别任务，其中需要检测从一种刺激到另一种刺激的变化。狨猴在绝对区分任务中失败，但完成了相对区分任务。绝对任务的失败表明狨猴无法在其长期记忆存储中形成全局声音模式的表示。相比之下，相关任务的成功表明狨猴对正在进行的声音有短期记忆，这使得在线监测能够检测传入声音与预期即将到来的声音之间的偏差。因此，目前的发现意味着狨猴至少可以感知听觉流中的相邻音调关系，而不管全局声音模式的时间配置如何。