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Evaluation der Wirksamkeit von Methadongabe auf den Gebrauch von Drogen (Powers & Anglin, 1993)→ wichtig: Interpretation eines Verlaufsmuster über die Zeit darf keine plausiblen Alternativerklärungen erlauben.- Beispielgraphik zu removed-treatment (Abb. 4.1 aus Shadish et al., 2002, S. 112)- (als 1. Prätest dann Intervention, dann zweiter Messzeitpunkt°oben sieht man dann natürlichen Verlauf der AV (auch wenn 2. Intervention weggelassen wird) → nicht interpretierbar, weil das scheint ja noch was zu wirken außer der Intervention, weil es ja keinen Einfluss auf AV zu haben scheint, dass Intervention wegfällt°unten, was passiert, wenn man Intervention (2.) weglässt und das lässt sich interpretieren, weil es hier ja wirklich runter geht)

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