Fertig, Michael (contributor) - 2004 - [Elektronische Ressource]
educational success would only reflect ability bias. Any empiri-
4 Michael Fertig
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In the following the terms “grade” and “class … relationship between
having to repeat a class and educational success is contaminated by ability
bias, we implemented an IV … success of treated students is simply due to a change in behavior/learn-
ing effort or the result of further interventions …