The Computational Neuroscience Laboratory
The Mind/Brain Institute
The Johns Hopkins University
Psychology Experiments


Thanks for your interest in participating in an online experiment. These experiments below will take only a few minutes of your time and provide us with valuable scientific data that will help us better understand how the brain processes visual information. Your time is greatly appreciated! Also, please tell your friends about these experiments using the automatic emailer below!
If you have questions about this study you can call or email the Principal Investigator Dr. Ernst Niebur at 410-516-8643, If you have questions about your rights as a participant in the research, please contact the Homewood Institutional Review Board of the Johns Hopkins University at 410-516-6580.

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If you cannot see the above Johns Hopkins Emblem (a coat of arms with a Maryland flag, two books, and a globe), java may not be enabled in your browser's options. Please ensure that it is. Also check whether or not your browser is able to run java. Please enable java before continuing with any of the experiments below. You will not be able to participate in any of the experiments if java is not enabled on your browser.

The following experiments are optimized for the Internet Explorer web browser. If you are using the Netscape web browser, you may experience problems in participating in this experiment.

Please note that this experiment is fully compatible ONLY with Microsoft's Internet Explorer versions 5.01 and above. For America Online users, please ensure that your are using America Online version 5.0 or above.

If you encounter any problems or difficulties performing the procedure, please email and describe your problem.
Thank you for your time and have fun!


There are two online experiments that will each take about 10 minutes to complete. You may choose one or both experiments.

Change Blindness: Search for objects within livingroom scenes.
This experiment is very fun and particularly challenging. It is kind of like finding Waldo in the "Where is Waldo?" pictures.
Time : approximately 10 minutes
Note : This experiment can take more time than 10 minutes, but that all depends on how fast you can find the objects!

Image Cropping: View a number of artificial and natural scenes.
Time : approximately 5 minutes
Note : See feedback at the end of the experiment about how you performed compared to other participants!

Tell a friend.
To tell a friend about this experiment, please type in their email address below and we will send them a brief email informing them of our online experiments.
(Note: We will only send one email to this person.)
Friend's email:

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