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J Exp Psychol Gen. 2016 Sep;145(9):1228-54. doi: 10.1037/xge0000192.

Structure at every scale: A semantic network account of the similarities between unrelated concepts.

Author information

Computational Cognitive Science Lab, School of Psychology, University of Adelaide.
University of New South Wales.
Laboratory of Experimental Psychology, Faculty of Psychology and Educational Sciences, University of Leuven.


Similarity plays an important role in organizing the semantic system. However, given that similarity cannot be defined on purely logical grounds, it is important to understand how people perceive similarities between different entities. Despite this, the vast majority of studies focus on measuring similarity between very closely related items. When considering concepts that are very weakly related, little is known. In this article, we present 4 experiments showing that there are reliable and systematic patterns in how people evaluate the similarities between very dissimilar entities. We present a semantic network account of these similarities showing that a spreading activation mechanism defined over a word association network naturally makes correct predictions about weak similarities, whereas, though simpler, models based on direct neighbors between word pairs derived using the same network cannot. (PsycINFO Database Record.

[Indexed for MEDLINE]

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