In order to participate in experiments at the Social Sciences Experimental Laboratory (SSEL) and in online experiments, you must register in our database using the lab's online recruitment system. Part of this registration process involves acknowledging the following basic rules of conduct:

• You can only register once in the ORSEE database. Registering multiple accounts undermines scientific research. Any participant found with more than one profile will be excluded from all future studies.
• A certain number of registered persons will receive an invitation email to each experiment. The exact number is determined by the researcher conducting that experiment. Only the invited persons may take part in that experiment.
• If you receive an invitation email, you must respond affirmatively in order to participate. Spaces in an experiment are limited, so it is important to respond early to better ensure that a space will still be available. Important Note: Once you respond affirmatively, you cannot later withdraw this response from the recruitment system, so please verify that you are actually able to come before you respond.
• Usually, some extra persons are invited to ensure that a minimum participation level is achieved. The method for determining participant and alternate status will be described in the invitation email. Alternates will receive compensation for arriving for the experiment on time. The exact amount of this payment is determined by the researcher conducting that particular experiment, and will be described in the invitation email.
• Participants will usually be compensated based on the decisions they make during the experiment. The exact amount of this payment is determined by the researcher conducting that particular experiment, and will be described in the invitation email.
• Important Note: After the scheduled start time, anyone who responded affirmatively to an invitation but did not show up will not receive any compensation for that experiment. In addition, he or she will be charged with a "no-show penalty." After a person receives 2 no-show penalties, he or she will be permanently removed from the database, and will be ineligible for any further experiments.
• During an experiment, participants must follow the directives of the researchers. The researchers will identify themselves before the commencement of the experiment.

The Social Sciences Experimental Laboratory (SSEL) is bound by the School of Social Sciences, Department of Economics.

SSEL's research-ethics responsibilities include the proper safeguarding of potentially sensitive data collected during an experiment. SSEL takes the following steps to meet its confidentiality requirements:

• All data collected during recruitment is stored on a server that is accessible only to SSEL research staff. These data are used only for the purpose of recruiting subjects to participate in SSEL experiments.
• All personally-identifying data collected during an experiment (e.g. your name) is processed according to the approved ethics document of the respective study. Usually, any personal information is replaced with a code number, and the list linking code numbers to personally-identifying data is kept separate from the experimental data.
• All human-subjects forms containing personally-identifying information (e.g. informed consent) are stored in secure locations.

As a human-subject participant at SSEL, it is your right to lodge a complaint if you believe that sensitive information about you collected during an experiment has not actually been kept confidential. Such complaints can be delivered to the Ethics and Research Governance at data.protection@soton.ac.uk