1. Overview


LIONESS regulates the information flow between participants. Before a session, the experimenter uploads the experimental program to the server, and sets its parameters in the control panel. In a typical online experiment participants log in to the server via a link posted on MTurk. Participants interact through their web browsers and receive a code to collect their payment on MTurk upon completion. Throughout the session, the control panel displays the participants’ progress in the experiment. Although the Figure above focuses on its use in MTurk experiments, the platform can also be used in an ‘offline’ decision-making laboratory, where payments can be associated with the participants’ cubicle number (see here for an example).

The first step of setting up your own experiment consists of creating a database.