Millisecond Forums

We just discovered a severe error in Inquisit Web. The bug occurred with this script: http://research.millisecond.com/persike/simcomparegs.web

The script is supposed to show faces compsed from two face halves. In total, there are 200 lower and 200 upper face halves. The names of the image files uploaded to the Inquisit server accordingly have the prefix "UPPER" or "LOWER".

Multiple subjects have mentioned the same problem while running the experiment from their web browser. On their machines, stimuli are not composed from one upper and one lower face half. Instead, Inquisit shows two bottom halves.

We can definitely exclude that this is due to a script error. The data files logged by Inquisit Web contain the correct filenames (i.e., 1x "UPPER", 1x "LOWER") while only two "LOWER" variants are actually displayed. Below I have posted an image from one of our subjects documenting the bug, and attached you find a data file containing data from this exact experimental run.



This needs to be fixed.

Kind regards, Malte