Millisecond Forums

Any image editing application has the ability to re-size images. Use the one you are most comfortable / familiar with and consult its documentation if necessary.

For example, when using Photoshop, instructions can be found here: https://helpx.adobe.com/photoshop/using/image-size-resolution.html#change_pixel_dimensions_of_an_image

The steps will generally be very similar in any other application.

Thanks. What is the best method to alter the resolution? 

Most of your images have a resolution of approx. 3000 by 2250 pixels. You will probably not encounter too many machines among your participants that run displays at that resolution or higher. Additionally, in most trials a given image doesn't cover the whole screen, but less than 50% of it. I would recommend finding some middle ground, i.e., going for a resolution that still looks okay when scaled-up to extremely high-res displays, but doesn't require massive down-scaling (and waste of graphics memory) on lower-res screens. With that in mind, I'd say you can probably reduce the images' resolution by 30 to 40 percent without incurring massive loss of quality.

Ok, as far as the picture resolution goes, I guess I just reduced the size of the images and not the resolution. What is the most appropriate way to change the resolution for all images and what resolution setting allows the images to look good on a variety of screens (as we are having participants run the program on various computers)? Thanks.

As far as I can determine from the web experiment's settings and the image files currently on the server, the only change has been the Inquisit Web version. The files' EXIF and other metadata appears unchanged, as does their resolution.

Looking at the error logs ( see https://www.millisecond.com/myaccount/logs/errors.aspx?webscriptid=10033&webscriptname=EMACAll3TasksVer2 in your account ) insufficient memory due to the images' resolution and the required down-scaling remains a distinct possibility.

The logs further indicate (see the version column https://www.millisecond.com/myaccount/logs/participants.aspx?webscriptid=10033&webscriptname=EMACAll3TasksVer2 ) that the participant is still using an outdated version. Have him/her download and install the latest web player version via the link on the launch page.

Hope this helps.

I've tried all three of the options you listed before with no luck. The participant is still getting error messages while trying to run the script. The error keeps saying "unable to initialize item number 5" The error also occurs with item #8. 

Again, the link to the script is: 

http://research.millisecond.com/dewitlab/EMACAll3tasksVer2.web

Thank you in advance for you help.

Ok, I unregistered the script and registered it again with all of the changes you suggested. I'll update this post once I hear back from the participant. Thanks.

When I follow the steps you outlined, I'm only able to select version 4.0.7.0. Thoughts?

Log in to your account, go to the web scripts section, click the edit button next to the experiment. In the wizard, select the version in the 1st step, click finish.

Thanks for looking at the script. Quick question, how do I go about updating the launch page and run an updated version of Inquisit?