Trial Commands for Expressions

Expressions can be executed at trial level with one of the following trial commends.

Trial Commands:

EX Execute Expression

OE On Expression

The EX trial command processes all expressions of an expression block and update any variables as defined in the expression. If you then use these variables as arguments of trial commands, they will contain the new value computed by the expressions. Use this trial commands to update variables during runtime and dynamically adjust values depending on the participant’s responses or other rules specific to your paradigm.

The OE trial command acts like a switch statement. First the expression block will be processed and then the final result will be compared against a list of different conditions. If a conditions matches, the corresponding trial command will be executed.