Ordonez Magro Laura, Pinto Arata Leonardo, Fagot Joël, Grainger Jonathan, Rey Arnaud
Psychological Sciences Research Institute, Université catholique de Louvain.
Aix-Marseille Université, CNRS, CRPN.
Cogn Sci. 2025 Aug;49(8):e70095. doi: 10.1111/cogs.70095.
Statistical learning allows us to implicitly create memory traces of recurring sequential patterns appearing in our environment. Here, we study the dynamics of how these sequential memory traces develop in a species of nonhuman primates (i.e., Guinea baboons, Papio papio) that, unlike humans, cannot use language and verbal recoding strategies to strengthen these memory traces. We test a group of Guinea baboons in a Hebb visuo-motor pointing task in which a target sequence is repeated with random sequences inserted between repetitions. In this study, we systematically manipulate the interval between two repetitions of the target sequence by varying the number of interposed random sequences. We found that baboons can learn repeated visuo-motor sequences, even when the repetitions are separated by six random sequences. Our results also suggest that the learning curve of the target sequence best fits a logarithmic function. The present study, therefore, provides a quantitative assessment of the development of a sequential memory trace as a function of repetition spacing and without the use of verbal recoding strategies.
统计学习使我们能够隐式地创建在我们环境中出现的重复序列模式的记忆痕迹。在此，我们研究了这些序列记忆痕迹在一种非人类灵长类动物（即几内亚狒狒，狒狒属）中是如何发展的，这种动物与人类不同，不能使用语言和言语编码策略来强化这些记忆痕迹。我们在一项赫布视觉运动指向任务中测试了一组几内亚狒狒，在该任务中，目标序列被重复呈现，且在重复之间插入随机序列。在本研究中，我们通过改变插入的随机序列数量来系统地操纵目标序列两次重复之间的间隔。我们发现，即使重复之间被六个随机序列隔开，狒狒也能学习重复的视觉运动序列。我们的结果还表明，目标序列的学习曲线最适合对数函数。因此，本研究提供了一种对序列记忆痕迹发展的定量评估，该评估是作为重复间隔的函数，且不使用言语编码策略。
