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Group: Administrators
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Visits: 104K
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Your IAT script expects some sort of numerical ID to assign participants to the different block orders in the IAT (compatible vs incompatible first). Depending on how you set your script up, it will either use the subject id or the group id for that (check the <expt> and/or <variables> elements in the script). If /groupassignment is not explicitly set to 'groupnumber', subject id will be used for condition assignment. If this is the case and you feed in a non-numerical subject ID (such as a Qualtrics identifier), the script will fail as you describe: No condition applies. Similarly, if your script expects a numerical group ID for condition assignment but you don't supply any, it will fail.
Note that you can test all of this using Inquisit Lab: Simply type in alphanumerical (subject / group) ids or leave one out entirely. The script will behave identically on the web.
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