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Because they tried them, then decided to not continue trying them because they didn't correlate as well and were difficult and expensive to implement.
by rhiever 12y ago
Because they tried them, then decided to not continue trying them because they didn't correlate as well and were difficult and expensive to implement.
- murbard2 12y agoThere main test has 60 datapoints... how many tries do you think they made exactly before deciding they didn't correlate as well? Yes, IQ tests are expensive, but if you buy one test, the marginal cost of giving to an extra student is basically 0. I suspect it wasn't tested at all.
- mzl 12y agoA real IQ test takes at least 2 hours of 1-on-1 time with a psycholigist to administer, so in the event that someone actually wants to do real iq testing the marginal cost is quite high.
- murbard2 12y agoThat's what psychometricians want you too believe. There is no scientific reason it needs to be administered by a human or be so long.
- barry-cotter 12y agoThe ASVAB, GRE, LSAT, MCAT, and SAT all have correlations with psychologist administered IQ tests of around 0.9. WORDSUM, which is a ten word vocabulary test has a correlation of 0.71[1]. [1]Every time I use the WORDSUM variable from the GSS people will complain that a score on a 10-question vocabulary test is not a good measure of intelligence. The reality is that “good” is too imprecise a term. The correlation between adult IQ and WORDSUM = 0.71. The source for this number is a 1980 paper, The Enduring Effects of Education on Verbal Skills. I’ve reproduced the relevant table… The Enduring Effect of Education on Verbal Skills http://www.jstor.org/discover/10.2307/2112492?uid=3737800&uid=2&uid=4&sid=21104842098621 http://www.jstor.org/discover/10.2307/2112492?uid=3737800&ui...
- walshemj 12y agoAre they really that hard I have done iq tests administered by professionals I can't recall it taking that long.