[On psycho-diagnostic of practical technical ability in juveniles (author's transl)].

230 juveniles were examined by means of the box of constructional blocks-in conformity with Huth -, and the results were analysed statistically in regard of sex, age, school year, and school certificates. Concerning working speed and the marks for technical conception, there is a significant difference between girls and boys. On an average, boys achieved better results than girls. These results of the performance variables have mainly been influenced by the school year that the juvenile attended at the date of these tests. Irrespectively of their sex, applicants for vocational training who had attended 10 forms achieved significantly better results than pupils of the 9th form. The test is useful for examinations concerning the aptitude-diagnostic.