Experimenters can choose to allow participants to complete the experiment if one (or more) of their group mates have dropped out. Should dropouts occur, standard procedures are in place to adequately deal with that.
Groups can be started as soon as sufficient participants are ready to start making decisions. Participants often do not enter experimental sessions exactly at the same time, and they will vary in the time they take to read instructions (and complete control questions). Furthermore, groups can be formed on-the-fly. Experimenters can choose to remove unresponsive participants from the experiment and let the others proceed. Timers can be added to decision pages, keeping up the pace of decision making in a group. LIONESS experiments help avoid dropouts with measures reducing waiting times. Moreover, in interactive experiments, dropouts can also affect other participants (e.g. Typically they complete their experiment from home, and can get distracted (especially when waiting on others), have a bad internet connection or may just leaving a session by closing the experimental pages. In online experiments, participants may drop out. The most important one is driving down dropouts. LIONESS experiments have built-in features that deal with these challenges. Online experiments: challenges and solutions ¶Ĭonducting experiments online presents a set of methodological and logistical challenges not present in the traditional decision making laboratory. This is extensively discussed in a paper by Arechar et al.
LIONESS experiments provide a set of standarized methods for group formation, attrition and other challenges of interactive online experiments. Throughout the session, the control panel displays the participants’ progress in the experiment. Participants interact through their web browsers and receive a code to collect their payment upon completion. In a typical online experiment participants log in to the server via a link posted on a crowd-sourcing website (e.g. Before a session, the experimenter uploads the LIONESS experiment to the server. LIONESS experiments regulate the information flow between participants. Using LIONESS Lab you can choose to share LIONESS experiments with your co-authors and other experimenters. At the end of a session, you can download a spreadsheet with the data, as well as a file to automate bonus payments on MTurk. Participants can then invited to online sessions, e.g. Once your LIONESS experiment is ready, you can download it and run it on your own server. At the same time, users with more advanced programming skills can use JavaScript to flexibly add a wide range of functionalities to their experiments. This way, researchers using LIONESS Lab require little programming skills. You can use a range of ready-made functions to get data from (and write to) the server. to calculate payoffs or manipulate variables. You can use JavaScript for any programming - e.g. A what-you-see-is-what-you-get interface allows you to easily define screens.
You can develop experiments from scratch in a point-and-click fashion or start from an existent design from our growing repository and adjust it according your own requirements. With LIONESS Lab you can readily develop and test your LIONESS experiments online in an user-friendly environment. LIONESS experiments include standardized methods to deal with group formation, handling participant dropout and other challenges of online interactive experiments. LIONESS Lab is a free web-based platform for online interactive experiments. Welcome to the LIONESS Lab documentation! ¶
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