Sorry, this experiment is on hold for the time being.

Can you tell when someone is looking at your photo? Find out by trying this photo telepathy test, which takes less than five minutes to complete.

How it works

There are either one or two subjects plus one looker. One of you registers your group with a name and password and supplies a digital photograph of the subjects. These images should be no larger in resolution than 640x480 pixels. All participants then log on to the experiment at a prearranged time.

With two subjects, both of their photos are shown to the looker in a random sequence of 20 trials. With a single subject, the subject's photo and a completely different photo are used. After ten seconds, each subject is asked to answer yes or no to the question, "Was your partner looking at a picture of you?"

The subjects can choose whether or not to receive immediate feedback after each trial as to whether the guess was correct or not. After each 20-trial test, the subjects are told their scores; the chance level is 10. With feedback, subjects may be able to increase their scores with practice.

Notes for teachers, group leaders and family-group participants

These experiments can be done with students or others in the same physical location, however in that case the lookers and subjects should be in separate rooms, beyond the range of sight and hearing. Families can try this out between different combinations of parents, children and siblings.

You can retrieve the details of your group's tests in a detailed table of data. All you need to do is give your group a name (minimum five letters). Then you ask the members of your group to register for the experiment using this name.

Say, for example, your group is called "sphinx". Then all subjects register with sphinx as the first part of their pair name. For instance, if one pair consists of James and Sharon, the name of their pair could be "sphinxjs"; if another pair consists of Martin and Cathy, their pair could be "sphinxmc".


If you experience any problem running the experiment, kindly contact us with the details about your group name, internet browser and most importantly the URL at which the error occurred along with a brief description of the problem.