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Investigating the treatment of missing data in an Olympiad-type test – the case of the selection validity in the South African Mathematics Olympiad
Long, Caroline
;
Engelbrecht, Johann
;
Scherman, Vanessa
;
Dunne, Tim
(
AOSIS Open Journals
,
2016-10-31
)
Evaluating anchor items and reframing assessment results through a practical application of the Rasch Measurement Model
Combrinck, Celeste
;
Scherman, Vanessa
;
Maree, David J.F.
(
Sage
,
2017-09
)
The use of Rasch competency bands for reporting criterion-referenced feedback and curriculum-standards attainment
Combrinck, Celeste
;
Scherman, Vanessa
;
Maree, David J.F.
(
University of the Free State, Faculty of Education
,
2016
)
Exploring differential science performance in Korea and South Africa : a multilevel analysis
Cho, Mee-Ok
;
Scherman, Vanessa
;
Gaigher, Estelle
(
University of the Free State
,
2014-12
)
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Scherman, Vanessa (4)
Combrinck, Celeste (2)
Maree, David J.F. (2)
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