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Stimulus reference frame and neural coding precision
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SYSNO ASEP 0459548 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stimulus reference frame and neural coding precision Tvůrce(i) Košťál, Lubomír (FGU-C) RID, ORCID, SAI Zdroj.dok. Journal of Mathematical Psychology. - : Elsevier - ISSN 0022-2496
Roč. 71, Apr 2016 (2016), s. 22-27Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Fisher information ; coding accuracy ; measurement scale ; Jeffreys prior Vědní obor RIV FH - Neurologie, neurochirurgie, neurovědy CEP GA15-08066S GA ČR - Grantová agentura ČR Institucionální podpora FGU-C - RVO:67985823 UT WOS 000374511600003 EID SCOPUS 84960533404 DOI 10.1016/j.jmp.2016.02.006 Anotace Any particular stimulus intensity, as a physical quantity, can be equivalently described in different unit systems. Researchers automatically expect the methodology and the inference obtained about the neural coding precision to be independent from such a subjective choice. We show, however, that the Fisher information, which is arguably the most popular measure of coding accuracy, may yield incompatible and in fact arbitrary results just by re-evaluating the identical stimulation scenario in transformed units. We consider only regular scale transformations given by strictly increasing and differentiable functions. On one hand, our results point to a potentially problematic aspect of the Fisher information application. On the other hand, we speculate that the unwanted transformation covariance may be removed by considering the psychophysical scale based on the ideal observer paradigm. We show that such scale implies constant Fisher information and that the matching stimulus distribution is given by the Jeffreys prior. The psychophysical perspective thus provides a novel justification for the special role of the Jeffreys prior in neural coding theory. Pracoviště Fyziologický ústav Kontakt Lucie Trajhanová, lucie.trajhanova@fgu.cas.cz, Tel.: 241 062 400 Rok sběru 2017
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