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Evaluation eines Programms zur Reduktion umweltbedingter Bleivergiftung in urbanen Haushalten mit niedrigem Einkommen (Duckart, 1998)- Prä-Post-Design mit Follow-up; AV: Bleigehalt- Ergebnis: signifikante Reduktion von Prä-zu Posttest und fast ebenso stark zu Follow-up- Bedrohungsfaktoren: → Reifung / Zwischenzeitliches Geschehen: Bleigehalt im Winter niedriger (Follow-ups im Winter)→ Testeffekte (Prätest löst Veränderung im Hygieneverhalten aus)→ Probandenausfall (weniger motivierte Personen fallen eher raus)
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