Estimating Effect Sizes From Pretest-Posttest-Control Group Designs  

Oleh:

Morris, Scott B.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Organizational Research Methods vol. 11 no. 2 (Apr. 2008), page 364-386.
Topik: Meta-Analysis; Effect Size; Repeated Measures; Experimental Design
Fulltext: 364.pdf (184.81KB)

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Perpustakaan Pusat (Semanggi) Nomor Panggil: OO3.9 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Previous research has recommended several measures of effect size for studies with repeated measurements in both treatment and control groups. Three alternate effect size estimates were compared in terms of bias, precision, and robustness to heterogeneity of variance. The results favored an effect size based on the mean pre-post change in the treatment group minus the mean pre-post change in the control group, divided by the pooled pretest standard deviation.

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