用分块机制模拟人类对复杂概念的自适应学习,突破传统模型局限。
Automatic Adaptation to Concept Complexity and Subjective Natural Concepts: A Cognitive Model based on Chunking
- 基于分块机制构建认知模型CogAct,自动适应不同复杂度概念。
- 在文学、国际象棋、音乐等真实数据上实现自然概念学习,无需预设知识结构。
- 支持个体主观概念空间建模,适合研究个性化认知差异。
认知科学的核心问题之一是短时记忆(STM)与长时记忆(LTM)中各类概念形成与检索的基本心理过程。本文提出分块机制起关键作用,并展示CogAct计算模型如何将概念学习建立在分块、注意力、STM和LTM等基本认知结构之上。首先,通过原则性演示,CogAct能自动适应学习从简单逻辑函数到人工类别,再到文学、国际象棋、音乐等异质领域中的原始自然概念(非预处理数据)。这种自适应学习对多数心理模型而言极为困难,例如传统模型通常仅限于人工类别,而(非GPT类)深度学习模型需针对任务调整架构。其次,我们提出了新型人类基准设计方法,可考虑主观性并控制个体经验影响,同时保持真实复杂类别。将CogAct嵌入个体参与者主观概念空间的模拟中,无需预训练知识结构即可从原始乐谱数据学习音乐概念。与深度学习模型对比后发现,该模型能有效捕捉人类主观判断。这些成果将概念学习与复杂性适应整合进更广泛的认知心理学理论框架,也为关注个体差异的心理学应用提供了新路径。
原文摘要 · Abstract (English)
A key issue in cognitive science concerns the fundamental psychological processes that underlie the formation and retrieval of multiple types of concepts in short-term and long-term memory (STM and LTM, respectively). We propose that chunking mechanisms play an essential role and show how the CogAct computational model grounds concept learning in fundamental cognitive processes and structures (such as chunking, attention, STM and LTM). First are the in-principle demonstrations, with CogAct automatically adapting to learn a range of categories from simple logical functions, to artificial categories, to natural raw (as opposed to natural pre-processed) concepts in the dissimilar domains of literature, chess and music. This kind of adaptive learning is difficult for most other psychological models, e.g., with cognitive models stopping at modelling artificial categories and (non-GPT) models based on deep learning requiring task-specific changes to the architecture. Secondly, we offer novel ways of designing human benchmarks for concept learning experiments and simulations accounting for subjectivity, ways to control for individual human experiences, all while keeping to real-life complex categories. We ground CogAct in simulations of subjective conceptual spaces of individual human participants, capturing humans subjective judgements in music, with the models learning from raw music score data without bootstrapping to pre-built knowledge structures. The CogAct simulations are compared to those obtained by a deep-learning model. These findings integrate concept learning and adaptation to complexity into the broader theories of cognitive psychology. Our approach may also be used in psychological applications that move away from modelling the average participant and towards capturing subjective concept space.
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