@article{kovacs_samplesizeplanner_2022,
	title = {{SampleSizePlanner}: {A} {Tool} to {Estimate} and {Justify} {Sample} {Size} for {Two}-{Group} {Studies}},
	volume = {5},
	issn = {2515-2459, 2515-2467},
	shorttitle = {{SampleSizePlanner}},
	url = {http://journals.sagepub.com/doi/10.1177/25152459211054059},
	doi = {10.1177/25152459211054059},
	abstract = {Planning sample size often requires researchers to identify a statistical technique and to make several choices during their calculations. Currently, there is a lack of clear guidelines for researchers to find and use the applicable procedure. In the present tutorial, we introduce a web app and R package that offer nine different procedures to determine and justify the sample size for independent two-group study designs. The application highlights the most important decision points for each procedure and suggests example justifications for them. The resulting sample-size report can serve as a template for preregistrations and manuscripts.},
	language = {en},
	number = {1},
	urldate = {2022-04-23},
	journal = {Advances in Methods and Practices in Psychological Science},
	author = {Kovacs, Marton and van Ravenzwaaij, Don and Hoekstra, Rink and Aczel, Balazs},
	month = jan,
	year = {2022},
	keywords = {R-project, sample size},
	pages = {251524592110540},
}

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