On 14/11/2007, Mark Schraad <[EMAIL PROTECTED]> wrote: > > These are relative and fuzzy scale indicators. They may not be linear, but > how do we know that they do not accurately reflect the situation.. The > second half of a tank of gas in my car always goes faster than the first... >
Mark, if my limited electrical engineering skills serve me, the rate of discharge of a lithium ion battery is not linear but follows something like a two-hump curve where the battery loses charge faster at very high & very low charge levels, and at a slower rate through the mid-range, with the slowest rate of loss at around 30% charge. Car fuel tanks are less complicated, but they're usually not evenly-shaped, so the 'level' of fuel is not necessarily a good indicator of the actual amount of fuel residing in the tank. However, the basic issue raised by Christopher - that some businesses will consciously distort the graphical representation of a numeric value to create a false impression is true and in evidence in a broad range of areas. Regards Steve ---------------------------------------------- Steve 'Doc' Baty B.Sc (Maths), M.EC, MBA Director, User Experience Strategy Red Square P: +612 8289 4930 M: +61 417 061 292 Member, UPA - www.upassoc.org Member, IxDA - www.ixda.org Member, Web Standards Group - www.webstandardsgroup.org Contributor, UXMatters - www.uxmatters.com ________________________________________________________________ *Come to IxDA Interaction08 | Savannah* February 8-10, 2008 in Savannah, GA, USA Register today: http://interaction08.ixda.org/ ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... [EMAIL PROTECTED] Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
