Differential diagnosis of ability in school children / by David Segel.

  • Segel, David.
Date:
1934
Catalogue details

Licence: In copyright

Credit: Differential diagnosis of ability in school children / by David Segel. Source: Wellcome Collection.

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    to a representative group of beginning junior college students. By the use of the probable errors for each of these measures the significance of the difference may be roughly estimated. It is not necessary to make a graphical representation of the situation for using this approximate method of differential diagnosis. However, where the significance of many differences are to be estimated and where the probable error for each test varies for the different parts of the scale, it is probably an economical method. METHODS FOR GETTING EQUIVALENT SCORES ON TESTS Consideration will next be given to the methods for getting equivalent scores. In the case of elemen- tary school measures where age or grade norms are usable, the results on different tests may be made equivalent by reducing them to age or grade norms. If age and grade norms are established, using the same population on two or more different tests for all the tests, the equivalences may be used directly. The only additional procedure necessary is to establish the probable error for each of the measures at the different grade levels. However, when tests have not been given to the same population, as is found generally to be the case with all tests except those made up in batteries, there is no guarantee that the norms are comparable. This has been shown by