# psychopy/psychopy

For running psychology and neuroscience experiments

Repository: https://github.com/psychopy/psychopy
Canonical: https://ross.abutalabs.com/products/psychopy
Homepage: http://www.psychopy.org
Language: Python
License: GPL-3.0
License Family: copyleft
Topics: science, neuroscience, experiment, experimental-design, experiment-control, psychophysics, psycholinguistics, linguistics, python, psychopy, psychology
Last push: 2026-08-26T14:45:05+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 86, longevity 100
- inputs: {"age_days": 5845, "days_push": 7, "days_rel": 14, "gap_med": 37, "n_releases_24m": 18}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2068, forks 984 (observed 2026-08-28T04:06:10.213190+00:00)

## What it is
PsychoPy is an open-source Python package for creating and running psychology and neuroscience experiments, offering both a graphical Builder interface and Python scripting. It supports precise psychophysics timing locally and can run experiments online via JavaScript.

## Use cases
- run a Stroop task with precise reaction-time measurement
- present visual stimuli for a psychophysics experiment
- build a cognitive psychology experiment without writing code
- run behavioral experiments online in the browser
- collect participant responses with keyboard, mouse, or hardware devices
- teach experimental design in a research methods course
- sync experiments with EEG or eye-tracking hardware

## When to choose
- you need millisecond-accurate stimulus presentation and timing
- you want a free alternative to E-Prime or Psychtoolbox
- you need both GUI-based and code-based experiment building
- you want to run the same experiment locally and online
- you're teaching students who need a low-code entry point

## When to avoid
- you need a general-purpose survey tool without precise timing
- your experiment is purely web-based and lightweight (jsPsych may suffice)
- you require a permissive license for proprietary redistribution (GPL-3.0)
- you need a fully stable modern GUI on Linux (Standalone installer is community-maintained)

## Facets
- artifact type: library
- maturity: stable
- function: gui, graphics, simulation, sdk, developer-tools
- domain: education
- platform: windows, python, cross-platform
- tags: experiment-control, stimulus-presentation, behavioral-science, psychophysics, neuroscience, reaction-time, online-experiments, builder-gui, psychology, research, macos, linux, web

## Member repositories
- psychopy/psychopy (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:10.213190+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:56:47.644680+00:00, confidence not recorded.
  - readme: https://github.com/psychopy/psychopy (fetched 2026-08-28T04:06:10.213190+00:00, sha dcd742dbaa5e)
  - homepage: http://www.psychopy.org (fetched 2026-08-29T10:37:03.415658+00:00, sha 4c9416441827)
  - site_page: http://psychopy.org/about/index.html (fetched 2026-08-29T10:37:03.424918+00:00, sha 0c6d456940b3)
  - site_page: http://psychopy.org/documentation.html (fetched 2026-08-29T10:37:03.445926+00:00, sha d4c62cb1d295)
  - registry_pypi: https://pypi.org/pypi/psychopy/json (fetched 2026-08-29T10:37:03.447473+00:00, sha 9720155c17f0)
  - site_page: http://psychopy.org/pricing.html (fetched 2026-08-29T10:37:03.443973+00:00, sha 6c3d4c7c7794)
  - site_page: http://psychopy.org/download.html (fetched 2026-08-29T10:37:03.426909+00:00, sha f0b956d37ca4)
  - site_page: http://psychopy.org/changelog.html (fetched 2026-08-29T10:37:03.430166+00:00, sha c93f57aeff4e)
- Data as of 2026-08-30T08:39:29.467469+00:00.