Participant Information
Registered members of the University of Pennsylvania community are invited to participate in experiments being conducted by researchers at the University. In order to participate, you must have a University of Pennsylvania affiliation, as this website is for students, staff, and faculty only.

You may sign up to participate in specific experiments using our web site. The site indicates the start and duration of available sessions and the show-up payment. Some sessions have restrictions on who is eligible to participate and/or a consent agreement in addition to this one. If so, this will be clearly described during the sign up process.

Experiments vary to some extent, but in general, procedures will be as follows: If you chose to participate, you will be asked to make decisions for which you will be paid. At the beginning of the session you will receive detailed and accurate instructions describing how payments will depend on decisions made by you and other participants. The rules and the payments may vary across sessions and may differ between participants. Should you chose to withdraw after listening to the instructions, or if we cannot use you in the session for any reason, you are entitled to a show up payment and are under no further obligation to us. If you chose to stay for the decision making portion of the session, you are entitled to the show-up payment plus whatever money you have earned during the course of the session. Payment is made following the session in cash. Payment is made in private and you will be asked to sign a payment receipt. The receipt is for accounting purposes only and will not be linked to your responses.

Participants do not waive any legal rights through their participation. Your participation is voluntary. If you decide to participate, you are free to withdraw your consent and discontinue participation at any time without penalty. If you have any questions, or if you wish to remove your name from our list login and change your email preferences or contact us at