Abstract
We propose a novel application of Formal Concept Analysis (FCA) to neural decoding:
instead of just trying to figure out which stimulus was presented, we demonstrate how to explore the semantic relationships in the neural representation of large sets of stimuli. FCA provides a way of displaying and interpreting such relationships via concept lattices. We explore the effects of neural code sparsity on the lattice. We then analyze neurophysiological data from high-level visual cortical area STSa, using an exact Bayesian approach to construct the formal context needed by FCA. Prominent features of the resulting concept lattices are discussed, including hierarchical face representation and indications for a product-of-experts code in real neurons.
instead of just trying to figure out which stimulus was presented, we demonstrate how to explore the semantic relationships in the neural representation of large sets of stimuli. FCA provides a way of displaying and interpreting such relationships via concept lattices. We explore the effects of neural code sparsity on the lattice. We then analyze neurophysiological data from high-level visual cortical area STSa, using an exact Bayesian approach to construct the formal context needed by FCA. Prominent features of the resulting concept lattices are discussed, including hierarchical face representation and indications for a product-of-experts code in real neurons.
Original language | English |
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Title of host publication | Advances in Neural Information Processing Systems 21 |
Editors | D Koller |
Place of Publication | Advances in Neural Information Processing Systems |
Publisher | Curran Associates, Inc. |
Pages | 428 - 435 |
ISBN (Print) | 9781605609492 |
Publication status | Published - 2009 |
Event | 22nd annual Conference on Neural Information Processing Systems - Vancouver, Canada Duration: 8 Dec 2008 → 10 Dec 2008 |
Publication series
Name | Neural Information Processing Systems Annual Conference |
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Conference
Conference | 22nd annual Conference on Neural Information Processing Systems |
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Country/Territory | Canada |
City | Vancouver |
Period | 8/12/08 → 10/12/08 |