title: 'psychTestR: An R package for designing and conducting behavioural psychological experiments' tags: - R - psychology - experiment design authors: - name: Peter M. C. Harrison orcid: 0000-0002-9851-9462 affiliation: "1, 2" # (Multiple affiliations must be quoted) affiliations: - name: Max Planck Institute for Empirical Aesthetics, Frankfurt, Germany index: 1 - name: Queen Mary University of London, UK index: 2 date: 6 February 2020 bibliography: paper.bib
Today's psychologists can choose from many different software packages for developing and administering psychological experiments, with the most appropriate package typically varying from task to task. For simple experiments based on short questionnaires, straightforward tools such as Survey Monkey or Google Forms can be most appropriate. For experiments depending on specialist hardware and accurate response time measurement, one might instead adopt the Python package PsychoPy [@Peirce2019]. For experiments administered over the Internet, one could also consider the Javascript package jsPsych [@de2015jspsych]. For experiments involving many online participants interacting in complex networks, the Dallinger framework will typically be preferable. Many more such tools exist, each specialised for a particular aspect of psychological research.
psychTestR constitutes a new tool for developing and administering psychological experiments. It occupies a special niche within this software landscape, one that may be summarised in terms of the following features:
psychTestR has already been used in various academic studies. Several adaptive ability tests have been developed using the software, including a melody discrimination test [@Harrison2017], a beat perception test [@Harrison2018], a mistuning perception test [@LarrouyMaestri2019], a pitch imagery test [@gelding2019developing], a visuospatial working memory test [@frielerJAJ], and a rhythmic ability test [@frielerRAT]. psychTestR also provides the underlying framework for data collection in the LongGold study, a longitudinal investigation of intelligence, musical ability, and personal development throughout adolescence. We are eager to see how psychTestR will be used in future research. For more information, please visit the psychTestR website, http://psychtestr.com, which provides software download links, introductory articles, tutorials, and function-level documentation.
The author gratefully acknowledges useful feedback from Daniel Müllensiefen, Klaus Frieler, Marcus Pearce, and Nicolas Ruth. He was supported by the EPSRC and AHRC Centre for Doctoral Training in Media and Arts Technology (EP/L01632X/1) and by the Humboldt foundation's Anneliese Maier research prize as awarded to Daniel Müllensiefen.
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