Brosch Michael, Oshurkova Elena, Bucks Cornelia, Scheich Henning
Leibniz-Institut für Neurobiologie, Brenneckestrasse 6, 39118 Magdeburg, Germany.
Neurosci Lett. 2006 Oct 2;406(1-2):97-101. doi: 10.1016/j.neulet.2006.07.021. Epub 2006 Aug 9.
Behavioral studies have shown that non-human primates can categorically discriminate descending from ascending frequency steps in sequences of pure tones. Here we show that the performance of a long-tail macaque remains stable in such a task when the silent interval between the tones of a frequency step is varied between 0 and 1100 ms. Our finding suggests that: (1) some monkeys can keep frequency-specific information in their short-term memory for periods >1s, which can be used to make categorical decisions on the direction of frequency steps, and that (2) their ability to categorize the direction of frequency steps may be more similar to humans than previously assumed.
行为研究表明，非人类灵长类动物能够明确区分纯音序列中频率由高到低和由低到高的变化。在此我们表明，当频率变化的纯音之间的静音间隔在0至1100毫秒之间变化时，一只长尾猕猴在该任务中的表现保持稳定。我们的发现表明：（1）一些猴子能够在其短期记忆中保持频率特定信息超过1秒，这些信息可用于对频率变化的方向做出分类决策；（2）它们对频率变化方向进行分类的能力可能比之前认为的更接近人类。
