McRae Ken, Cree George S, Westmacott Robyn, Sa Virginia R De
U Western Ontario.
Can J Exp Psychol. 1999 Dec;53(4):360-373. doi: 10.1037/h0087323.
The role of feature correlations in semantic memory is a central issue in conceptual representation. In two versions of the feature verification task, participants were faster to verify that a feature (< is juicy >) is part of a concept (grapefruit) if it is strongly rather than weakly intercorrelated with the other features of that concept. Contrasting interactions between feature correlations and SOA were found when the concept versus the feature was presented first. An attractor network model of word meaning that naturally learns and uses feature correlations predicted those interactions. This research provides further evidence that semantic memory includes implicitly learned statistical knowledge of feature relationships, in contrast to theories such as spreading activation networks, in which feature correlations play no role.
特征相关性在语义记忆中的作用是概念表征中的一个核心问题。在特征验证任务的两个版本中，如果一个特征（<多汁>）与某个概念（柚子）的其他特征高度相关而非低度相关，参与者就能更快地验证该特征是这个概念的一部分。当首先呈现概念而非特征时，发现了特征相关性与刺激呈现间隔（SOA）之间的对比性交互作用。一个自然学习和使用特征相关性的词义吸引子网络模型预测了这些交互作用。与诸如扩散激活网络等特征相关性不起作用的理论相反，这项研究提供了进一步的证据，表明语义记忆包含了对特征关系的隐性学习统计知识。
