/sci/ - Science & Math

>>10271440
On the WAIS, for instance, IQ can inform you about the raw score on a certain subtest. Here's the difference in 2 standard deviations on the vocabulary subtest. As you can see, the 70 IQ student was unable to define any abstract words. The 100 IQ student was able to define a few abstract words. The 130 IQ student was able to define almost all the words asked. However, on the high end, small differences in raw score can translate to a large difference in percentile ranking, and thus IQ score. For instance, the 130 IQ student gave an insufficient definition for "Winter" while the 100 IQ student gave a sufficient definition, but no one would pretend that the 130 IQ student doesn't know what winter is or that they have a weaker grasp of english than the other two students. My point is that they lose resolution at the high end, but probably not at the very high end, because people who shatter the test ceiling would have no problem answering every single question correctly.