For Researchers


All researchers wanting to use C.E.L.S.S should contact the lab manager at to gain access to ORSEE. Importantly, they need to comply with Institutional Review Board (IRB) regulations and standard behavioral rules.

  • All experiments, except those for classroom purposes, must be approved by the IRB. The purpose of the IRB is to protect the rights and welfare of individuals who are participating as subjects in the research. For more information, please refer to IRB website.
  • All researchers who use the lab must sign the the usage agreements for ORSEE (here) and C.E.L.S.S. (here).


C.E.L.S.S uses ORSEE. a web-based Online Recruitment System, specifically designed for organizing laboratory experiments to recruit participants for experiments. We have compiled a quick guide to use ORSEE here. Detailed information on the features of ORSEE can be found on the ORSEE documentation here.

The laboratory provides extensive support for experiments using z-Tree and MATLAB. The z-Tree community is extremely active online, starting with the official website. CELSS routinely conducts an introductory tutorial on zTree at least once every academic year.

We also provide some support for experiments using Multistage. Information for this free programming package can be accessed from the Multistage website.

Conducting an experiment

Our guide to conducting experiments at C.E.L.S.S. is accessible here.

Guest Policy

Researchers whose departments are not part of C.E.L.S.S. may request to use the lab as an external guest.

  • Guests ​must follow all rules of the lab
  • Researchers whose department is a member of C.E.L.S.S. have precedence in booking the lab. In particular, guests cannot reserve the lab more than 3 days in advance of running an experiment and may be excluded from the lab during periods of very high demand.

Using the lab as a guest is best done a​s an exceptional occurrence, at the start of a researcher​’s interaction with C.E.L.S.S. If ​researchers expect to use the lab regularly, they should consider ​asking​ their department to become a member of C.E.L.S.S. ​Membership involves sign​ing​ a MoU and contribut​ing​ ​a yearly membership fee.

For more information, please contact the lab manager at

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