PALMS是一款模拟经典与注意力型条件反射模型的Python工具,支持复杂实验设计。
PALMS: A Computational Implementation for Pavlovian Associative Learning Models' Simulation
- 基于Python实现多种条件学习模型,含新扩展的统一学习率版本。
- 可模拟数百个刺激的实验,支持构型线索计算,提升预测能力。
- 适合神经科学家优化实验设计、比较模型表现和提出新理论。
与静态形式化不同,计算定义描述了模型的操作机制。模拟是理论发展与完善循环中的关键环节,有助于研究者精确定义模型所需参数并做出准确预测。本文介绍了一个在Python环境中实现的经典条件反射学习模型计算框架,名为帕夫洛夫关联学习模型仿真(PALMS)。除了经典的Rescorla-Wagner模型外,还实现了多种注意模型,包括Pearce-Kaye-Hall、Mackintosh扩展、Le Pelley的混合模型,以及一种新提出的统一变量学习率扩展版Rescorla-Wagner模型,该扩展融合了Mackintosh与Pearce和Hall的对立概念。据我们所知,此前仅有首个注意模型以通用设计工具实现过计算表达。PALMS集成图形界面,支持以实验神经科学家常用的字母数字格式输入完整实验设计。其独特之处在于可模拟包含数百个刺激的实验(如人类被试常用设计),并计算所有模型下的构型线索及其复合物,从而显著拓展模型的预测能力。论文详细描述了各模型的实现方式。通过模拟五项已发表的关联学习文献中的实验,验证了PALMS的有效性,表明该工具能帮助神经科学家识别关键变量、优化实验设计、做出精确预测、比较模型拟合度,并推动新理论构建。
原文摘要 · Abstract (English)
In contrast to static formalisms, computational definitions describe the operational mechanisms of a model. Simulations are an essential part of the cycle of theory development and refinement, assisting researchers in formulating the precise definitions that models require, and making accurate predictions. This manuscript introduces a computational implementation of Pavlovian learning models in a Python environment, termed Pavlovian Associative Learning Models' Simulation (PALMS). In addition to the canonical Rescorla-Wagner model, attentional approaches are implemented, including Pearce-Kaye-Hall, Mackintosh Extended, Le Pelley's Hybrid, and a novel extension of the Rescorla-Wagner model featuring a unified variable learning rate that synthesises Mackintosh's and Pearce and Hall's opposing conceptualisations. To our knowledge, only the first attentional model has been previously specified computationally in a general design tool. PALMS integrates a graphical interface that permits the input of entire experimental designs in an alphanumeric format, akin to that used by experimental neuroscientists. It uniquely enables the simulation of experiments involving hundreds of stimuli, such as those used with human participants, and the computation of configural cues and configural-cue compounds across all models, thereby substantially broadening their predictive capabilities. A comprehensive description of the models' implementation is provided in the paper. We evaluate PALMS by simulating five published experiments in the associative learning literature that assessed the predictive scope of existing models, and we show that this implementation provides neuroscientists with a useful tool for identifying critical variables, refining experimental designs, making precise predictions, comparing model fitness, and formulating new theoretical approaches.
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