Custom variables can be supplied to each participant via URL parameters in the study link.
Participants can be allocated to a specific group by appending the
pspg parameter to the study link. Participant groups can be used to segregate your participants for between-subjects designs, screening, branching and merging.
For example, https://www.psychstudio.com/s/987?pspg=1 will allocate the participant to Group 1.
Participant group will appear in the results under the column group_number (Figure 1).
When supplying the
custom_id variable via a URL parameter, a participants results will contain that custom id. This is useful for linking participants to individual result sets or for correlating participants across different systems or platforms.
For example, https://www.psychstudio.com/s/987?custom_id=ert45 will associate the participant with a custom id of ert45.
Custom identifiers will appear in the results under the column custom_id (Figure 1).
Participants can also be associated with arbitrary data via URL parameters.
These data will appear in the results under the column custom_vars (Figure 1).