Design. Collect. Analyze.

100,000+ users in institutions across 77 countries have made E-Prime the world-leading stimulus presentation software.

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.

Timing accuracy

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.

Hardware integrations

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.

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.

Cloud Licensing

• • • Perpetual and Annual Licenses available
    • Add users to your department’s license with ease
    • Greater flexibility and control with Group Licenses
    • Internet connection needed when designing/editing in E-Studio
    • No internet connection needed when collecting data with E-Run
    • No need to keep track of your USB License Key
    • Share with colleagues in and out of the lab
    • Makes remote work easier
    • No shipping fees
    • Start using your license faster

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 $995 OR USB License $1055

Annual Single-User Cloud License $495

Perpetual Group Cloud OR USB License starts at $995/user

Annual Group Cloud License starts at $495/user

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

Upgrade from E-Prime 2.0 and save 20%. Contact Sales for details.

Requirements E-Prime 3.0 Update 4

Find Requirements for previous builds here.

*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 [19550] for details.

***Please see sound timing recommendations in AV: Sound Latency – Not all sound cards provide optimal millisecond timing [17206].

Social Resources

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!

Follow us on YouTube, Twitter, Facebook, LinkedIn, and Instagram to be the first to learn of new resources, updates, and events!

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.

Community Resources

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

The E-Primer is an independent book written by Michiel Spapé, Henk van Steenbergen, Rinus Verdonschot, Saskia van Dantzig. The E-Primer provides an introduction into a wide range of experiments that can be set up using E-Prime. The E-Primer is available on Amazon.

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

Explore Our E-Prime Experiment Library

Our Support Site offers access to over 150 fully developed experiments, all in a ready-to-run format. These tasks can be downloaded and customized to fit your research needs, providing a quick and flexible starting point for your projects.

If you don’t yet have an E-Prime license, you can download the demo version to explore and test these experiments. The library includes a wide range of commonly used psychological paradigms covering attention, executive functioning, perception, memory, language, and social psychology.

Start leveraging our extensive experiment collection to accelerate your research and streamline task design.

See our full listing below!

Attention

• Dot Probe Task [34333]
• Anti-Saccade Task [34521]
• Attentional Blink Task [34518]
• Psychomotor Vigilance Task (PVT) [30113]
• Wisconsin Card Sorting Test (WCST) [30115]
• Attention Network Task (ANT) [30118]
• AX-Continuous Performance Task (AX-CPT) [30128]
• Stroop Task [30142]
• STEP: Serial Position [35377]
• STEP: Inspection Time Task [35389]
• STEP: Stimulus-Driven Attentional Capture and Attentional Control Settings [35346]
• STEP: The Negative Priming Effect [35314]
• STEP: A Feature Integration Theory of Attention [35315]
• STEP: Studies of Interference in Serial Verbal Reactions [35306]
• STEP: Chronometric Analysis of Classification [35280]
• STEP: Attention and the Detection of Signals [35283]
• STEP: Attention to Visual Pattern Information Produces the Blink in Rapid Serial Visual Presentation [35299]
• STEP: Controlled and Automatic Human Information Processing [35298]
• STEP: Attentional Limitations in Doing Two Tasks at the Same Time [35271]
• STEP: Forest Before the Trees: The Precedence of Global Features in Visual Perception [35266]
• STEP: Visual Search [35267]
• STEP: Does IOR Occur in Discrimination Tasks? [35256]
• STEP: Splitting the Beam: Distributon of Attention over Noncontinuous Regions of the Visual Field [35228]
• STEP: Reassessing the Evidence for Novel Popout [35172]
• STEP: Visual Attention Within and Around the Field of Focal Attention [35115]
• STEP: Grouping Strategies with Simultaneous Stimuli [35125]
• STEP: Signal Detection Theory and Psychophysics [35127]
• STEP: The Role of Auditory Localization in Attention and Memory [35087]
• STEP: Response and Encoding Factors in “Ignoring” Irrelevant Information [35121]

Executive Function

• Tower of London [34553]
• Word Fluency Task [34520]
• Stop Signal Task [30108]
• Game of Dice Task [30126]
• Balloon Analogue Risk Task (BART) [30127]
• Flanker Task [30137]
• Go/No-Go Test [30143]
• STEP: Multi-Towers [35374]
• STEP: Iowa Gambling Task [35370]
• STEP: Tower of Hanoi [34460]

Memory

• Corsi Block-Tapping Task [34537]
• Operation Span Task [34524]
• Digit-Span Backward Task [34457]
• Digit-Span Forward Task [34456]
• Digit Symbol Substitution Test (DSST) [30114]
• Sternberg Working Memory Task [30120]
• Dual n-Back Task [30139]
• n-Back Task (Fixed and Array) [30140]
• STEP: N-Back Test [35375]
• STEP: Digit Span [34570]
• STEP: Abstractness, Imagery, and Meaningfulness in Paired-Associate Learning [35356]
• STEP: Altering Retrieval Demands Reverses the Picture Superiority Effect [35339]
• STEP: Characteristics of Word Encoding [35345]
• STEP: High Speed Scanning in Human Memory [35304]
• STEP: Creating False Memories [35287]
• STEP: Primary Memory [35330]
• STEP: Availability Versus Accessibility of Information in Memory for Words [35320]
• STEP: Associative Encoding and Retrieval [35312]
• STEP: On the Genesis of Abstract Ideas [35277]
• STEP: Short-term Retention of Individual Verbal Items [35273]
• STEP: An Experimental Study of Memory [35191]
• STEP: Can Imagery be Distinguished from Other Forms of Internal Representation [35217]
• STEP: Perceptual Enhancement: Persistent Effects of an Experience [35169]
• STEP: Depth of Processing and the Retention of Words in Episodic Memory [35113]
• STEP: Some Tests of the Decay Theory of Immediate Memory [35089]
• STEP: Memory for the Pragmatic Implications of Sentences [35086]
• STEP: Time Required to Prepare for a Rotated Stimulus [35105]
• STEP: Acoustic Confusions in Immediate Memory [35091]
• STEP: The Abstraction of Linguistic Ideas [35063]
• STEP: The Role of Rehearsal in Short-Term Memory [35114]
• STEP: Individual Differences in Working Memory Capacity [35090]
• STEP: Mental Imagery and Associative Learning [35060]
• STEP: Baddeley – Acoustic Similarity [34660]

Cognition

• Iowa Gambling Task (IGT) [34519]
• Sentence Symbol Comparison Task [34525]
• Trail Making Task [34477]
• Working Memory Task [30123]
• Auditory Oddball [30130]

Social Psychology

• Implicit Association Test (IAT) Using Words and Images [41909]
• Trier Social Stress Test (TSST) [30119]
• Prisoner’s Dilemma [30121]
• Cyberball [30124]
• Implicit Association Test (IAT) [30141]
• STEP: Category Accessibility and Impression Formation [35244]
• STEP: New Experimental Attempts at Preventing Mechanization in Problem Solving [35230]
• STEP: Cognitive Representation of Personality Impresssions [35142]
• STEP: The Calibration and Resolution of Confidence in Perceptual Judgements (1994) [35037]
• STEP: On the Calibration of Knowledge and Perception (1995) [35043]

Motor Skills

• Smooth Pursuit Task [34551]
• Pursuit Rotor Task [30109]
• Bilateral Complex Finger Tapping (BCFT) [30116]
• Simple Reaction Time [30133]
• STEP: The Information Available in Brief Visual Presentations [35301]
• STEP: Crossed-Uncrossed Differences in Reaction Time [34563]

Language

• Auditory Responsive Naming Task (ARNT) [30122]
• Cross-Modal Priming Task (CMPT) [30125]
• Lexical Decision Task [30135]
• STEP: Cross Lexical Decision [34566]
• STEP: Cross Naming [34455]
• STEP: Implicit Attribution Task [34591]

Sensation and Perception

• Visual Search Task [30110]
• Change Blindness Task [30131]
• Rotation of Mental Images [30147]
• STEP: Auditory Illusions and Confusions [35322]
• STEP: Visual Illusions [35296]
• STEP: Blind Spots [35286]
• STEP: Color Adaptation of Edge-Detectors in the Human Visual System [35257]
• STEP: An Investigation of Variables in Judgements of Relative Area [35148]
• STEP: Good Patterns have Few Alternatives [35123]

Psycholinguistics

• STEP: Cued Shadowing [34569]
• STEP: Automatic (prelexical) Phonetic Activation in Silent Word Reading [35354]
• STEP: Evidence for the immediate use of verb control information in sentence processing [35126]
• STEP: An Interactive Activation Model of Context Effects in Letter Perception [35291]
• STEP: Visual Lexical Access is Initially Phonolgical: 2 [35254]
• STEP: On the Learning of Morphological Rules: An Experimental Analogy [35270]
• STEP: Facilitation in Recognizing Pairs of Words [35264]
• STEP: The Interaction of Lexical and Syntactic Ambiguity [35129]
• STEP: Identifying the Actor in Pseudosentences [35262]
• STEP: Visual Lexical Analysis is Initially Phonological: 1 [35236]
• STEP: Paradigms and Processes in Reading Comprehension [35128]
• STEP: The Organization and Activation of Othographic Knowledge in Reading Aloud [35124]
• STEP: Gating Language and the Cognitive Process [35140]
• STEP: On the process of comparing sentences against pictures [35092]
• STEP: In Search of Gender Neutrality [35122]
• STEP: Some effects of introducing and withdrawing knowledge of results early and late in practice [35047]

Human Factors

• STEP: Fitt’s Law [35343]
• STEP: Do Reaction Time and Accuracy Measure the Same Aspects of Letter Recognition [35293]
• STEP: Stimulus Information as a Determinant of Reaction Time [35168]
• STEP: Multiple Resources for Processing and Storage in Short-Term Working Memory [35192]
• STEP: Reasons for Confidence [35197]

Developmental Psychology

• STEP: Online Measures of Basic Language Skills of Children with Early Focal Brain Lesions [35259]

Psychophysiology

• STEP: Reaction Time to Retinal Stimulation with Special Reference to the Time Lost in Conduction Through Nerve Centers [35276]

User/Student Submissions

• Rebus Puzzle (E-Prime Challenge 2019) [34531]
• Visual-Tactile Task (E-Prime Challenge 2019) [34533]
• Pong Task Repeated (E-Prime Challenge 2019) [34530]
• Readiness Potential (E-Prime Challenge 2019) [34534]
• Zodiac Zity (E-Prime Challenge 2019) [34383]
• Expectation of Social Interaction with a Virtual Agent based on Mutual Gaze Duration (E-Prime Challenge 2018) [30112]
• Plants Vs. Zombies Dynamic (E-Prime Challenge 2018) [30144]
• Effort Expenditure for Rewards Task Modified for Food (E-Prime Challenge 2018) [30146]
• Relaxation Task (E-Prime Challenge 2018) [30148]
• Pong By Witt (E-Prime Challenge 2018) [30149]
• The Influence of Losing or Winning Money on the Perception of Emotional Pictures (E-Prime Challenge 2018) [30150]
• Social Norm Learning Experiment (E-Prime Challenge 2018) [30151]
• Speech in Noise Test Using Acoustic Change (E-Prime Challenge 2018) [30152]
• List to Object Search (E-Prime Challenge 2018) [30153]
• STEP: Gender Language Competition [35396]
• STEP: Perceived Distance [35399]
• STEP: Relationship of Color to Fear Reactions [34464]
• STEP: Horizontal Vertical Math [35397]
• STEP: Visual Auditory Rhyme [35401]
• STEP: Implicit Trigger Learning [35398]
• STEP: Gender Implicit Attitudes [35395]
• STEP: Shape Stroop [35400]
• STEP: Bilingual Stroop [34461]
• STEP: Decision Distractors for Letters [34458]
• STEP: Bi-directional Priming [34544]
• STEP: Emotional Content Recall [34555]
• STEP: Algebra Strategies [34536]
• STEP: Animal Stroop Task [34543]