{"_id":"Rq4xGySWiKhBtCD2T","bibbaseid":"kovacs-vanravenzwaaij-hoekstra-aczel-samplesizeplanneratooltoestimateandjustifysamplesizefortwogroupstudies-2022","author_short":["Kovacs, M.","van Ravenzwaaij, D.","Hoekstra, R.","Aczel, B."],"bibdata":{"bibtype":"article","type":"article","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":[{"propositions":[],"lastnames":["Kovacs"],"firstnames":["Marton"],"suffixes":[]},{"propositions":["van"],"lastnames":["Ravenzwaaij"],"firstnames":["Don"],"suffixes":[]},{"propositions":[],"lastnames":["Hoekstra"],"firstnames":["Rink"],"suffixes":[]},{"propositions":[],"lastnames":["Aczel"],"firstnames":["Balazs"],"suffixes":[]}],"month":"January","year":"2022","keywords":"R-project, sample size","pages":"251524592110540","bibtex":"@article{kovacs_samplesizeplanner_2022,\n\ttitle = {{SampleSizePlanner}: {A} {Tool} to {Estimate} and {Justify} {Sample} {Size} for {Two}-{Group} {Studies}},\n\tvolume = {5},\n\tissn = {2515-2459, 2515-2467},\n\tshorttitle = {{SampleSizePlanner}},\n\turl = {http://journals.sagepub.com/doi/10.1177/25152459211054059},\n\tdoi = {10.1177/25152459211054059},\n\tabstract = {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.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2022-04-23},\n\tjournal = {Advances in Methods and Practices in Psychological Science},\n\tauthor = {Kovacs, Marton and van Ravenzwaaij, Don and Hoekstra, Rink and Aczel, Balazs},\n\tmonth = jan,\n\tyear = {2022},\n\tkeywords = {R-project, sample size},\n\tpages = {251524592110540},\n}\n\n","author_short":["Kovacs, M.","van Ravenzwaaij, D.","Hoekstra, R.","Aczel, B."],"key":"kovacs_samplesizeplanner_2022","id":"kovacs_samplesizeplanner_2022","bibbaseid":"kovacs-vanravenzwaaij-hoekstra-aczel-samplesizeplanneratooltoestimateandjustifysamplesizefortwogroupstudies-2022","role":"author","urls":{"Paper":"http://journals.sagepub.com/doi/10.1177/25152459211054059"},"keyword":["R-project","sample size"],"metadata":{"authorlinks":{}},"html":""},"bibtype":"article","biburl":"https://bibbase.org/zotero/iagogv","dataSources":["ovn29uG6Mbp3JWCRR"],"keywords":["r-project","sample size"],"search_terms":["samplesizeplanner","tool","estimate","justify","sample","size","two","group","studies","kovacs","van ravenzwaaij","hoekstra","aczel"],"title":"SampleSizePlanner: A Tool to Estimate and Justify Sample Size for Two-Group Studies","year":2022}