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August, Justin Oswin. Nelson Mandela University; 2020. Socio-ecological, contextual effects in Raven’s Colour Progressive Matrices scores: Developing an index for guiding test selection and interpretation.
August, Justin Oswin. Nelson Mandela University; 2019. Socio-ecological, contextual effects in Raven’s Colour Progressive Matrices scores: developing an index for guiding test selection and interpretation.
August, Justin Oswin. Nelson Mandela Metropolitan University; 2017. A normative study of the Raven's Coloured Progressive Matrices for South African children with cognitive barriers to learning.