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PsychoPy2: experiments in behavior made easy

Peirce, Jonathan; Gray, Jeremy R.; Simpson, Sol; MacAskill, Michael; H�chenberger, Richard; Sogo, Hiroyuki; Kastman, Erik; Lindel�v, Jonas


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Professor of Psychology Research Methods

Jeremy R. Gray

Sol Simpson

Michael MacAskill

Richard H�chenberger

Hiroyuki Sogo

Erik Kastman

Jonas Lindel�v


PsychoPy is an application for the creation of experiments in behavioral science (psychology, neuroscience, linguistics, etc.) with precise spatial control and timing of stimuli. It now provides a choice of interface; users can write scripts Python if they choose, while those that prefer to construct experiments graphically can use the new Builder interface. Here we describe the features that have been added over the last 10 years of its development. The most notable addition has been that Builder interface, allowing users to create studies with minimal or no programming, while also allowing the insertion of Python code for maximal flexibility. We also present some of the other new features, including further stimulus options, asynchronous timestamped hardware polling, and better support for open science and reproducibility. Tens of thousands of users now launch PsychoPy every month and more than 90 people have contributed to the code. We discuss the current state of the project, as well as plans for the future.


Peirce, J., Gray, J. R., Simpson, S., MacAskill, M., Höchenberger, R., Sogo, H., …Lindeløv, J. (2019). PsychoPy2: experiments in behavior made easy. Behavior Research Methods, 51(1), 195–203.

Journal Article Type Article
Acceptance Date Dec 20, 2018
Online Publication Date Feb 7, 2019
Publication Date Feb 28, 2019
Deposit Date Jan 16, 2019
Publicly Available Date Feb 11, 2019
Journal Behavior Research Methods
Print ISSN 1554-351X
Electronic ISSN 1554-3528
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 51
Issue 1
Pages 195–203
Keywords Psychology; Software; Experiment; Open-source; Reaction time; Timing
Public URL
Publisher URL
Additional Information First Online: 7 February 2019


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