Lehrl S, Kinzel W, Schubert H, Knapp G
MMW Munch Med Wochenschr. 1976 Feb 27;118(9):259-62.
Even short tests can still be materially shortened when they are intended to provide rough information. An example of a short intelligence test shows that considerable reductions are permissible when the procedure is intended to classify subjects into IQ groups of roughly "under 100" or "over 100". Also division into three as below average, average and above average level of intelligence is possible, and also division into four grades. If about 85% accuracy is satisfactory, a three-problem test is sufficient. For grading into three and four parts, six and nine problems, respectively may be adequate.
即使是简短的测试，如果旨在提供大致信息，仍可大幅缩短。一个简短智力测试的例子表明，当测试程序旨在将受试者分为大致“低于100”或“高于100”的智商组时，进行大幅缩减是可行的。同样，也可以将智力水平分为低于平均、平均和高于平均三个等级，甚至分为四个等级。如果大约85%的准确率就令人满意，那么一个由三个问题组成的测试就足够了。对于分为三个和四个部分的分级，分别有六个和九个问题可能就足够了。
