2018 | OriginalPaper | Buchkapitel
7. Power Analysis Using R
verfasst von : Tetsuya Sakai
Erschienen in: Laboratory Experiments in Information Retrieval
Verlag: Springer Singapore
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Abstract
stats
and pwr
. (The present author is solely responsible for any problems caused by modifying the original scripts of Toyoda.) Finally, it provides summary while touching upon a survey I conducted using these R scripts, with a decade’s worth of IR papers from ACM SIGIR (http://sigir.org/) and TOIS (https://tois.acm.org/) (Sakai Statistical significance, power, and sample sizes: a systematic review of SIGIR and TOIS. In: Proceedings of ACM SIGIR 2016, pp 5–14, 2016), where it was demonstrated that there are highly overpowered and highly underpowered experiments in the results reported in the IR literature. Highly overpowered experiments use a lot more resources than necessary, while highly underpowered experiments are highly likely to miss important differences that exist due to the use of small samples. We can probably do better by learning from previous studies and/or from pilot studies.