Portion of participants showing as DATA_RETRIEVED and never FINISHED
I am having an issue where some of the participants never show as FINISHED in jatos (just DATA_RETRIEVED). It happens about 20% of the time. The data files that are listed as DATA_RETRIEVED are missing some of the trials near the end of the experiment, the number of misign trials is variable.
I know that this isn't just people ending the study early because participants are entering the correct confirmation code which is only shown at the very end.
I am ending the study with jatos.endStudyAjax();
I thought that maybe the issue was due to slow internet connections, but I added a 20sec pause after the end of the study (after the Ajax call, but before the conf. code is shown) so that people don't exit early. This didn't seem to have any effect.
I am running this via DigitalOcean on MTurk. Any ideas what might be going on?