Supported Operating Systems

  • Windows Vista or higher
  • Mac OS X 10.7 or higher
  • iOS 8 or higher

Minimum Hardware Requirements


  • 800-megahertz (MHz) 32-bit (x86) processor or 800-MHz 64-bit (x64) processor.
  • 512 megabytes (MB) of system memory
  • DirectX 9-class graphics card
  • 32 MB of graphics memory
  • 5 GB of free hard disk space
  • Audio output capability (for sound presentation only)


  • An Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor.
  • 2 GB of RAM
  • 5 GB of free hard disk space
  • Audio output capability (for sound presentation only)


  • iPhone 4s or higher.
  • iPad 2 or higher
  • iPod Touch 5th generation or higher

Inquisit is an open-ended programming platform, so it is theoretically possible to design an experiment that would exceed the capacity of the most powerful computer on the planet. As a simple example, your experiment could attempt to load and present a billion images, each of which is billion pixels in heigth and width, which would easily choke even the best machines rolling off the production lines at Dell, HP, or Apple. Generally speaking, if your experiment involves lots of pictures and/or video, you'll want to have a decent graphics card along with enough system RAM to buffer all of the pictures used by the experiment. If you are using speech recognition or voice key input, or you are presenting audio files, you should invest in a decent sound card, along with enough system RAM to buffer your sound files. Otherwise, if your experiment involves little or no media files or audio streams, the minimum system requirements should be more than adequate.

Inquisit 5.0.7 Released
April 14, 2017
Millisecond is pleased to release Inquisit 5.0.7, a major stability and performance update for Inquisit 5. This update fixes a number of sporadic bugs reported by customers using Inquisit in the field. We thank those customers for reporting the probl
Free Inquisit 5 Workshop at ICPS 2017 Vienna
October 10, 2016
Millisecond is pleased to present a free Inquisit 5 workshop immediately preceding the ICPS 2017 conference in Vienna, Austria. Inquisit 5 for Online and Mobile Psychological ResearchTime: Thurs, Mar 23, 14:00-16:00
Inquisit 5 Lab Critical Update Available for Download
June 05, 2016
Inquisit 5.0.2 is now available for download. All customers running Inquisit 5 Lab are urged to update to Inquisit 5.0.2 as soon as possible. This update fixes a number of bugs, including a critical issue that can cause
Inquisit 5 has been released!
February 24, 2016
Millisecond is pleased to announce the release of Inquisit 5, the latest version of its popular psychological testing platform. One new feature of Inquisit 5 that we are particularly excited about is support for iOS devices such as iPads an
Running Studies with Inquisit and MTurk (UPDATED)
March 12, 2015
UPDATE: Good news for Inquisit Web researchers - downloading the Inquisit Web app is no longer against MTurk policy. Amazon has loosened it's policy around software downloads. Rather than prohibiting software downloads in general, the new polic
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