Design. Collect. Analyze.
100,000+ users in institutions across 75 countries have made E-Prime the world-leading stimulus presentation software.
Remote data collection with
Pack your experiment, share the link, download your data.
E-Prime Go is a free download for E-Prime 3.0 users! You can host your experiments on our site and share the link with your participants. Once the participant completes the experiment, their data will be automatically uploaded to your account. To access E-Prime Go, simply register your E-Prime 3.0 serial number on our support site to download the E-Prime Go application.
Drag and drop design.
Build experiments with text, images, sound, and videos by dragging and dropping objects onto your timeline. Take advantage of free templates and 100+ pre-built experiments in our Experiment and STEP Libraries.
E-Prime 3.0 reports timing accuracy to the millisecond precision level. Be sure to use our testing tools to confirm your computer hardware is capable of critical timing. Add Chronos to your research setup to verify the display timing of your monitor, obtain millisecond-accurate participant responses, as well as millisecond-accurate sound onset times.
Unlimited Data Collection.
Collect unlimited data in the lab with E-Run and remotely with E-Prime Go! E-Studio provides descriptive menus and intuitive data logging options. E-DataAid provides the tools to filter, analyze, and export your data.
Use Task Events to send and receive triggers through Chronos, socket, serial, or parallel port. Use Chronos Adapters for a simple connection to a wide range of EEG, fNIRS, and physiological devices to send and receive digital triggers. If you are using a wireless EEG system, we also have an E-Prime package file for LSL hosted on GitHub.
Dedicated support team
We have a dedicated team of technical consultants available to assist you with experiment setup, troubleshooting, and best practice tips. Submit a support request on our support site.
Scripting for beginners and pros.
E-Prime’s scripting language, E-Basic, increases the flexibility and control of your experiments. Dozens of resources are available so that even users without experience in scripting can take advantage of this powerful feature.
Introducing Cloud Licensing!
The following license types permit unlimited experiment design on concurrent machines equal to number of “users” purchased with license, unlimited data collection on 25 lab machines per/user at a time, as well as unlimited data collection on participants via E-Prime Go. Annual license types require renewal to continue using E-Prime (save 20% if you renew before expiring).
Perpetual Single-User Cloud OR USB License $995
Annual Single-User Cloud License $495
Perpetual Group Cloud OR USB License starts at $995/user
Annual Group Cloud License starts at $495/user
Quantity discounts available
Upgrade from E-Prime 2.0 and save 20%. Contact Sales for details. You will need access to your E-Prime 2.0 USB License Key to receive your promo code. Please note, the E-Prime 2.0 USB License Key must not have already been used to validate an Upgrade License.
The E-Prime 3.0 Runtime License permits data collection on 100 lab machines. Experiment design and data analysis is not permitted. This license is only needed when you are collecting data on more than 25 lab machines or working with another site to collect data. $125 per license
Requirements E-Prime 3.0 Update 3
Find Requirements for previous builds here.
|Operating System||Windows® 10, 11*||Windows® 10, 11*|
|Processor||Intel Core i5 3000 Series 3GHz|
AMD FX 6000 Series 3GHz
|Intel Core i7 10000 Series 3GHz or higher|
AMD Ryzen 7 3000 Series 3GHz or higher
|RAM||8GB||16GB or higher|
|Video Card||DirectX™ 11** or greater adapter||DirectX™ 11** or greater adapter with 4GB RAM or higher|
|Ports||USB (if using USB License Key or Chronos®) USB||USB|
|Additional||Chronos® or a Core Audio sound card compatible for audio presentation***||Chronos® or a Core Audio sound card compatible for audio presentation***|
*The machine must also meet Windows 11 requirements. See Windows 11 System Requirements (microsoft.com).
**DirectX 11 Hardware Acceleration required for Windows 8, 10 and 11. See TIMING: E-Prime requires specific DirectX 11 settings for accurate timing  for details.
***Please see sound timing recommendations in AV: Sound Latency – Not all sound cards provide optimal millisecond timing .
Our YouTube channel is updated frequently with new tutorials. If you can’t find what you’re looking for, let us know and we’ll include it in a future video!
Support Site Resources
The new E-Prime 3 Experiment Library includes completed experiments that can be downloaded to use and/or modify. Examples of how to perform specific actions in your experiment are available in our Samples area.
Browse or search hundreds of articles in our Knowledge Base and Online Documentation sections. Our Online Documentation includes Advanced Tutorials on using images, movies, sounds, and scripting in E-Prime.
If you would like to join the conversation in our user community, please check the E-Prime Google Group. PST Technical Consultants do not moderate this group. If you would like to work with a PST Technical Consultant, please submit a support request on our Product Service and Support Site.
STEP (System for Teaching Experimental Psychology) was organized by Brian MacWhinney in the Department of Psychology at Carnegie Mellon University. STEP created E-Prime experiments and E-Prime script samples which are now available on our Product Service and Support Site.
The E-Primer is an independent book written by Amazon.provides an introduction into a wide range of experiments that can be set up using E-Prime. The E-Primer is available on
The E-Primer – Second Edition
The E-Primer has been updated for E-Prime 3. E-Prime is the leading software suite by Psychology Software Tools for designing and running psychology lab experiments. The E-Primer acts as a guide to this tool, providing all the necessary knowledge to make E-Prime accessible to everyone. You can learn the tools of psychological science by following The E-Primer through a series of entertaining, step-by-step instructions that recreate classic experiments.
The E-Primer Second Edition is available on Amazon