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Direct linkDavidowitz, Bette; Potgieter, Marietjie – International Journal of Science Education, 2016
Research has shown that a high level of content knowledge (CK) is necessary but not sufficient to develop the special knowledge base of expert teachers known as pedagogical content knowledge (PCK). This study contributes towards research to quantify the relationship between CK and PCK in science. In order to determine the proportion of the…
Descriptors: Item Response Theory, Pedagogical Content Knowledge, Organic Chemistry, Science Education
Retief, Liezel; Potgieter, Marietjie; Lutz, Marietjie – African Journal of Research in Mathematics, Science and Technology Education, 2013
In this paper the use of the Rasch model is explored as a transparent, systematic and theoretically underpinned response to quality issues that are widely recognised as problematic in the refinement of Likert scale questionnaires. Key issues are the choice of length of scale, the pursuit of a favourable estimate of Cronbach's alpha at the possible…
Descriptors: Item Response Theory, Test Construction, Likert Scales, Questionnaires
Boshoff, N. – South African Journal of Higher Education, 2009
This article critically examines the methodology of the Shanghai Academic Ranking of World Universities (ARWU) by generating raw scores for the "big five" South African research universities (Stellenbosch, Cape Town, Kwazulu-Natal, Pretoria and the Witwatersrand, henceforth referred to as SU, UCT, UKZN, UP and WITS) using the ARWU…
Descriptors: Institutional Research, Research Universities, Foreign Countries, Raw Scores
Potgieter, Marietjie; Malatje, Esther; Gaigher, Estelle; Venter, Elsie – International Journal of Science Education, 2010
This study investigated the use of performance-confidence relationships to signal the presence of alternative conceptions and inadequate problem-solving skills in mechanics. A group of 33 students entering physics at a South African university participated in the project. The test instrument consisted of 20 items derived from existing standardised…
Descriptors: Foreign Countries, Instructional Design, Test Items, Mechanics (Physics)
