Bonnardel V. (2017) Back to Representationalism. Constructivist Foundations 13(1): 132–133. https://cepa.info/4416
Bonnardel V.
(
2017)
Back to Representationalism.
Constructivist Foundations 13(1): 132–133.
Fulltext at https://cepa.info/4416
Open peer commentary on the article “Missing Colors: The Enactivist Approach to Perception” by Adrián G. Palacios, María-José Escobar & Esteban Céspedes. Upshot: Palacios, Escobar and Céspedes consider misrepresentation and comparability in the context of the enactivist approach of colour perception. This consideration leads them to propose the introduction of a weak form of representationalism to account for internal representation of “reality” and “shared experience” and to accommodate the Bayesian principle of prior information used in machine vision. The weak representationalism is not limited to brain states but may include embodied factors to be compatible with the enactivist framework. My commentary will essentially consider the misrepresentation and comparability arguments used by the authors to introduce the notion of representation.
Bonnardel V. & Varela F. J. (1991) A frequency view of color vision: Measuring the human sensitivity to square-wave spectral power distributions. Proceedings of the Royal Society of London. Series B: Biological Sciences 245(1314): 165–171. https://cepa.info/2073
Bonnardel V. & Varela F. J.
(
1991)
A frequency view of color vision: Measuring the human sensitivity to square-wave spectral power distributions.
Proceedings of the Royal Society of London. Series B: Biological Sciences 245(1314): 165–171.
Fulltext at https://cepa.info/2073
We have measured the chromatic threshold sensitivity to stimuli with spectral composition determined by a periodic function of energy over wavelength. This approach is analogous to frequency studies of spatial vision for the study of colour. A device was constructed permitting the synthesis of illuminants over the entire visible range (400–700 nm) in which phase, frequency and amplitude can be independently controlled. We have used 12 frequencies of square-wave functions (from 0.5 to 3.6 cycles/300 nm) and seven values of phase (between 0 degrees and 180 degrees) to obtain the contrast sensitivity function of the chromatic system in three normal trichromats. The results show maximum sensitivity around 1.5 cycles/300 nm and a high-frequency cut-off at 3.6 cycles/300 nm. These empirical values are compared with the predictions obtained from three current psychophysical models of opponent-colour process.
Bonnardel V., Martinoya C. & Varela F. J. (1991) Une méthode de mesure de la sensibilité aux modulations périodique d’énergie lumineuse spectrale chez l’Homme [Measuring the contrast sensitivity to periodic spectral modulations in man]. Comptes Rendus de l’Académie des Sciences Series III 312: 695–700.
Bonnardel V., Martinoya C. & Varela F. J.
(
1991)
Une méthode de mesure de la sensibilité aux modulations périodique d’énergie lumineuse spectrale chez l’Homme [Measuring the contrast sensitivity to periodic spectral modulations in man].
Comptes Rendus de l’Académie des Sciences Series III 312: 695–700.
Palacios A., Bonnardel V. & Varela F. J. (1990) L’”autoshaping”: méthode psychophysique pour la discrimination chromaitque chez les oiseaux. Comptes Rendus de l’Académie des Sciences 311: 213–218.
Palacios A., Bonnardel V. & Varela F. J.
(
1990)
L’”autoshaping”: méthode psychophysique pour la discrimination chromaitque chez les oiseaux.
Comptes Rendus de l’Académie des Sciences 311: 213–218.