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All Journal Gadjah Mada Journal of Psychology
Wiradhany, Wisnu
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Pemahaman Peneliti Psikologi mengenai Besaran Sampel: Data dan Simulasi Wiradhany, Wisnu; Adiasto, Krisna; Yulianto, Jony Eko; Kiling, Indra Yohanes
Jurnal Psikologi Vol 46, No 2 (2019)
Publisher : Faculty of Psychology, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (920.403 KB) | DOI: 10.22146/jpsi.24260

Abstract

The lack of knowledge on how to determine sample sizes in experiments is arguably one of the main reasons underlying the replication crisis in psychological science. A survey distributed among Indonesian students and researchers concerning 1) familiarity and understanding of statistical concepts related to sampling size determination, 2) current sample size determination practices in experiments, and 3) ideal sample sizes for experiments. Subsequently, we simulated expected statistical power given the sample sizes reported in the survey. Results demonstrated that 1) while a majority of participants were somewhat familiar with statistical concepts related to sampling size determination, they did not always endorse the correct and/or complete definition of each concept. Furthermore, 2) participants relied on practical considerations in determining sample sizes. Consequently, 3) the reported sample sizes did not have sufficient power to detect small to medium effect sizes, which are commonly present in psychological science.
Co-Authors Adiasto, Krisna Jony Eko Yulianto Kiling, Indra Yohanes