I don't want to sound self-serving, but I would recommend Affect 4.0. This is a freeware package that can be downloaded from: http://fac.ppw.kuleuven.be/clep/affect4/. In principle, Affect 4.0 allows you to implement any type of experiment via a graphical user interface. More information about this program can be found at the Affect 4.0 website or in the following paper:

Spruyt, A., Clarysse, J., Vansteenwegen, D., Baeyens, F., & Hermans, D. (2010). Affect 4.0: A free software package for implementing psychological and psychophysiological experiments. Experimental Psychology, 57, 36-45.

Good luck!

I would echo David's comments on E-Prime and PsychToolbox. Presentation is paid, and has a steep learning curve if you don't have programming experience, although it has a graphical user interface for some aspects, such as experiment parameters. Like E-prime, it runs on Windows. One of the key features of Presentation is its very accurate timing, but I believe PsychToolbox is also very accurate timing-wise. Good luck!

PEBL is also easy to use, free, and has a battery loaded in the software. If you are familiar with programming language, the preloaded tests are easy to modify:

http://pebl.sourceforge.net

You may also try open source software "PsychoPy" http://www.psychopy.org/

and "OpenSesame" http://osdoc.cogsci.nl/

Dear all,

Paradigm. It's a new GUI based stimulus presentation system that has an integrated Python scripting interface so you get the ease of use of a drag and drop experiment builder but still get the flexibility/power of using Python when you need it. It also easily integrates with a wider range of fMRI hardware (Lumina, fORP, custom response pads, USB triggering). It also offers easy integration and triggering with a wide range of EEG/EMG/TMS systems and ASL eye trackers. Paradigm is reasonably priced for faculty and offers student licenses.

Paradigm also now supports running experiments of iPhone and iPad with millisecond accuracy.

You can learn more here:

http://www.paradigmexperiments.com

Full disclosure - I'm one of the Paradigm developers. If you have any

questions you can email me directly: bruno at prsemail.com

For running behavioral experiments in a web browser you can try jspsych. It is open source and their site has some nice examples: http://www.jspsych.org/

Thank you Roger. What is your personal opinion about these products?

Check out Inquisit by Millisecond Software - http://www.millisecond.com

• Runs on Windows, Mac OS X, and iOS (as of Dec 2015)
• Supports local testing in the lab as well as remote testing over the web. Write once, run in either context.
• Extensive library of tests covering a wide range of testing paradigms and psychological process, all open source for you to customize and free to use with Inquisit.

http://www.millisecond.com/download/library/

• 30-day free trial, just download from our site, no hassle or forms to fill out

http://www.millisecond.com/download/

http://www.millisecond.com

Pretty informative. Thanks for sharing all the information. 

I've used couple of stimulus presentation software. I suggest to go for Psychopy as it's easy for non-programmer and vast for skilled programmer in python. It has both of GUI and scripting mode. http://www.psychopy.org/ 

My organization has a cloud/mobile computer-adaptive psychometric platform, including an approach to judge-based ratings (multisource/360) that adjusts for various biases.  We also have a psychometrically calibrated approach to mass-personalizing development for Educational, Developmental, Social or Organizational Psychology interventions.  It can be customized for any experiment or field study.

PEBL

If you have audio stimuli, anything Python-based will have trouble with audio libraries in Windows. So, Psychopy is out.

Thanks so much for your answers! This will be some summer work for me.

Is that so, C T Dicanio? I've been struggling really hard with psychopy for my sound experiment, and I didn't know it was a general issue for windows. Glad to know I'm not the only one.

Pedro - yes. My IT department looked into it on my lab's computers and determined this to be a general issue. Because of this, we are running our Psychopy experiment on an old mac actually, and not on the new lab Windows machines. I plan to switch to different software.

I'm very excited to find this post! Thank you all for sharing!

Disclaimer: I work for Psychstudio. I'd highly recommend https://www.psychstudio.com for web based psychology experiments, particularly if you want sophisticated stimulus management (including audio) and do not want to code as Psychstudio is completely user interface driven. You can sign up for a trial account and create a few experiments to try it out.