Behavior Research Methods (2015) - Comment
pubmed: 24570335  doi: 10.3758/s13428-014-0453-3  issn: 1554-3528 

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Michael Melia, Martin Schmidt, Britta Geissler, Jochem König, Ulrike Krahn, Hans Jürgen Ottersbach, Stephan Letzel, Axel Muttray