An investigation into educational and occupational differences in test performance on a battery of adaptability tests for Africans

De Ridder, Jacobus Celicourt2015-03-102015-03-102015-03-10http://hdl.handle.net/10539/17221Thesis (Ph.D.(Psychology))--University of the Witwatersrand, Faculty of Arts, 1956.enAn investigation into educational and occupational differences in test performance on a battery of adaptability tests for AfricansThesis