Necessary steps in factor analysis: Enhancing validation studies of educational instruments. The PHEEM applied to clerks as an example
Schönrock-Adema, Johanna ; Heijne-Penninga, Marjolein ; van Hell, Elisabeth A. ; Cohen-Schotanus, Janke
Medical teacher, 2009-01, Vol.31 (6), p.e226-e232 [Revista revisada por pares]England: Informa UK Ltd
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