Art wrote <<< Just think how many questions there would have to be to make fine distinctions along the whole ability spectrum! >>>
I dunno about IQ tests, but for many of the 'aptitude' tests the move is toward computirized adaptive testing, where a far higher proportion of the questions are (at least in theory) at approximately the right level of difficulty Peter Peter L. Flom, PhD Assistant Director, Statistics and Data Analysis Core Center for Drug Use and HIV Research National Development and Research Institutes 71 W. 23rd St www.peterflom.com New York, NY 10010 (212) 845-4485 (voice) (917) 438-0894 (fax) . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
