![]() Like normal readers, braille readers can read at 200 to 400 words per minute. Your guesstimate of 40 words in 10 seconds leads to a 240 word-per-minute reading speed. At a minimum the data being transmitted would require an analysis of the typography's geometry (edge detection being a basic function of the retina), the amount of the visual field taken up by the display, the location of the display's image on the retina relative to the fovea, and the rates of change in the display and surrounding motion (the speaker, other audience members, etc). 40 words in 10 seconds doesn't translate to 1000 bits per second transmitted over the optic nerve, which connects the retina to the banks of the calcarine sulcus in the occipital lobe, via the optic chiasm and the lateral geniculate nucleus. While PowerPoint is surely a horrid way to transmit information, I'm not sure we can inject very abstract information into people at ethernet rates. Spatial adjacency greatly reduces the memory problems associated with making comparisons of small amounts of information stacked in time (PP slides, for example). Memory problems can be partly handled by high-resolution displays, so that key comparisons are made adjacent in space within the common eyespan. On the other hand, many serious data displays are not in the familiar 4D space/time coordinate system that our eye-brain knows so well. Call that 1000 bits per second, which comes to 1/10,000 of the routine human retina-brain data capacity.Īlso most of our evidence displays are in flatland, which is a easier than 3D perceptual tasks. The average PP slide contains 40 words, which take less 10 seconds to read. Looking around the world is easier than analyzing evidence displays, and there may also be within-brain impediments to handling vast amounts of abstract data, but at least the narrow-band choke point for information resolution should not be the display itself. The research suggests that the human retina transmits data to the brain at the rate of 10 million bits per second, which is close to an Ethernet connection! Freed, from the University of Pennsylvania School of Medicine, and Ronen Segev and Michael J. Here is a link to a press-release summary account of an article in Current Biology (July 2006) by Judith McLean and Michael A. This is, for example, the conclusion of sparkline analysis in Beautiful Evidence, where the idea is to make our data graphics at least operate at the resolution of good typography (say 2400 dpi). In all my books, one of the key arguments revolves around the routinely spectacular resolution of the human eye-brain system, which then in turn leads to the idea that our displays of evidence should be worthy of human eye-brain system.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |