Inquisit Language Reference
The onexptbegin attribute specifies commands to be run at the beginning of a expt.
|expression||One or more expressions, delimited by semi-colons. See help with expression syntax for more information.|
This parameter executes one or more specified expressions at the beginning of a expt. The expressions can read and conditionally update the various properties in the script. This is useful for dynamically configuring the expt and its blocks and trials based on the value of the subject id, the computer/display settings, and other properties.
The following expt updates a text item based on whether the subject code is even or odd:
/ blocks=[1-5=practice; 6-10=test)]
/ onexptbegin=[if (mod(script.subjectid, 2) == 0) text.welcome.item.1 = "You have been assigned to condition A";]
/ onexptbegin=[if mod(script.subjectid, 2) == 1 then text.welcome.item.1 = "You have been assigned to condition B; "]