Paper on a subjective distance in the space of stimuli.

[Ines Samengo]

Dear connectionists,

the following preprint, to appear in Neural Computation, may be
of interest to some of you.
Best regards,

Ines Samengo.
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A subjective distance between stimuli: quantifying the metric structure
of representations

D. Oliva, I. Samengo, S. Leutgeb, S. Mizumori

As subjects perceive the sensory world, different stimuli elicit a
number of neural representations. Here, a subjective distance between
stimuli is defined, measuring the degree of similarity between the
underlying representations. As an example, the subjective distance
between different locations in space is calculated from the
activity of rodent hippocampal place cells, and lateral septal cells.
Such a distance is compared to the real distance, between locations.
As the number of sampled neurons increases, the subjective distance
shows a tendency to resemble the metrics of real space.

http://arXiv.org/abs/q-bio/0408008

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Ines Samengo
samengo at cab.cnea.gov.ar
http://www.cab.cnea.gov.ar/users/samengo/samengo.html
tel: +54 2944 445100 - fax: +54 2944 445299
Centro Atomico Bariloche
(8.400) San Carlos de Bariloche
Rio Negro, Argentina
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