Thesis (BEd)-- Stellenbosch University, 1944 / Stellenbosch University. Faculty of Education. Dept. of Educational Psychology. / ENGLISH ABSTRACT: Activities such as throwing are, as a rule, carried out only with the better arm. Mostly this one-sided execution is due to mere convenience. If attempts are made to justify it, in the main two arguments are advanced: In the first place, it is taken for granted that the inferior arm cannot make appreciable progress anyway, and it is therefore considered as not worthwhile exercising it. In the second place, it is believed that, if the inferior arm should improve by such a practice, this happens at the expense of efficiency in general, and may have detrimental consequences in some regards or other. / AFRIKAANSE OPSOMMING: geen opsomming