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ceptional
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- July 11, 2011
- 08:08 AM
- 468 views
Color space pictured and animated (Derrington Krauskopf Lennie)
by Alex Holcombe in ceptional
The Derrington, Krauskopf and Lennie (1984) color space is based on the Macleod-Boynton (1979) chromaticity diagram. Colors are represented in 3 dimensions using spherical coordinates that specify the elevation from the isoluminant plane, the azimuth (the hue) and the contrast (as a fraction of the maximal modulations along the cardinal axes of the space). It’s [...]... Read more »
Derrington AM, Krauskopf J, & Lennie P. (1984) Chromatic mechanisms in lateral geniculate nucleus of macaque. The Journal of physiology, 241-65. PMID: 6512691
MacLeod DI, & Boynton RM. (1979) Chromaticity diagram showing cone excitation by stimuli of equal luminance. Journal of the Optical Society of America, 69(8), 1183-6. PMID: 490231
- August 15, 2010
- 07:21 PM
- 480 views
Explaining temporal resolution with water-works of the visual system
by Alex Holcombe in ceptional
Most people are confused about temporal resolution. That includes my students, and even BBC science programmes. So I created this diagram to communicate the basic concept, with the example of human visual processing, using a water-works metaphor. Why water-works? I’m trying to explain an unfamiliar concept in terms that everyone can understand intuitively. By using [...]... Read more »
Rene Descartes. (1664) Traite de l'Homme (Treatise of Man). Harvard University Press (1972). info:/
Holcombe AO, & Cavanagh P. (2001) Early binding of feature pairs for visual perception. Nature Neuroscience, 4(2), 127-8. PMID: 11175871
- July 11, 2010
- 09:32 PM
- 366 views
cracks in the edifice of visual time?
by Alex Holcombe in ceptional
Below is a draft of a chapter I’m writing for Subjective Time, an upcoming book from MIT Press edited by Valtteri Arstila and Dan Lloyd. In a bowling alley, a professional player launches his ball down the lane. As the ball rolls toward the pins, our visual experience of it is smooth and seamless. The [...]... Read more »
Holcombe, A. (2009) Seeing slow and seeing fast: two limits on perception. Trends in Cognitive Sciences, 13(5), 216-221. DOI: 10.1016/j.tics.2009.02.005
Kline, K., & Eagleman, D. (2008) Evidence against the temporal subsampling account of illusory motion reversal. Journal of Vision, 8(4), 13-13. DOI: 10.1167/8.4.13
VanRullen R, Reddy L, & Koch C. (2005) Attention-driven discrete sampling of motion perception. Proceedings of the National Academy of Sciences of the United States of America, 102(14), 5291-6. PMID: 15793010
- February 5, 2010
- 05:53 AM
- 498 views
the rise of neuroscience
by Alex Holcombe in ceptional
So I knew neuroscience has exploded over the last few decades, but I didn’t know its emergence as a more autonomous discipline is “the biggest structural change in scientific citation patterns over the past decade”. In the authors’ words that follow, they are referring to their figure showing neuroscience emerging as a new citation [...]... Read more »
Rosvall, M., & Bergstrom, C. (2010) Mapping Change in Large Networks. PLoS ONE, 5(1). DOI: 10.1371/journal.pone.0008694
- September 27, 2009
- 03:27 AM
- 630 views
optimizing your coffee consumption
by Alex Holcombe in ceptional
We live in an era where students, shift workers, and scientists increasingly consume drugs that modify brain activity in order to enhance cognition. Ethicists are right to fret about this as the number of addictive substances with some ill effects proliferates (DeJong et al. 2008). People will use these things regardless whether or not some [...]... Read more »
DEJONGH, R., BOLT, I., SCHERMER, M., & OLIVIER, B. (2008) Botox for the brain: enhancement of cognition, mood and pro-social behavior and blunting of unwanted memories. Neuroscience , 32(4), 760-776. DOI: 10.1016/j.neubiorev.2007.12.001
Shi J, Benowitz NL, Denaro CP, & Sheiner LB. (1993) Pharmacokinetic-pharmacodynamic modeling of caffeine: tolerance to pressor effects. Clinical pharmacology and therapeutics, 53(1), 6-14. PMID: 8422743
- August 22, 2009
- 09:22 PM
- 683 views
Vestibulo-neck-ular reflex and stumbling baby
by Alex Holcombe in ceptional
After several students requested copies, I posted two movies on youtube, one of how visual input to balance can make a baby fall when visual stimulation is perverse. The other shows how the owl’s vestibular system allows its neck to quickly counterrotate to compensate for the body’s movement.
Both videos make people laugh. Both demonstrate aspects [...]... Read more »
Money KE, & Correia MJ. (1972) The vestibular system of the owl. Comparative biochemistry and physiology. A, Comparative physiology, 42(2), 353-8. PMID: 4404369
- December 12, 2008
- 04:29 AM
- 732 views
The binding problem: A new encyclopedia entry
by Alex Holcombe in ceptional
The conventional encyclopedia: old and unimproved!
Here is a preprint of my entry for the The Sage Encyclopedia of Perception with headword “The Binding Problem”. The hardcopy version of the encyclopedia will be a massive 1100-page tome with hundreds of contributors. Sadly, this is very much a conventional, 20th-century era encyclopedia—the style guide prohibited me from [...]... Read more »
Alex O. Holcombe. (2009) The binding problem. The Sage Encyclopedia of Perception.
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