Authors
Gabriel Recchia, Magnus Sahlgren, Pentti Kanerva, Michael N Jones
Publication date
2015
Journal
Computational intelligence and neuroscience
Volume
2015
Issue
1
Pages
986574
Publisher
Hindawi Publishing Corporation
Description
Circular convolution and random permutation have each been proposed as neurally plausible binding operators capable of encoding sequential information in semantic memory. We perform several controlled comparisons of circular convolution and random permutation as means of encoding paired associates as well as encoding sequential information. Random permutations outperformed convolution with respect to the number of paired associates that can be reliably stored in a single memory trace. Performance was equal on semantic tasks when using a small corpus, but random permutations were ultimately capable of achieving superior performance due to their higher scalability to large corpora. Finally, “noisy” permutations in which units are mapped to other units arbitrarily (no one‐to‐one mapping) perform nearly as well as true permutations. These findings increase the neurological plausibility of random …
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