A block consists of one or more tasks. The order of the individual tasks within a block can be adjusted via drag & drop. By clicking on the properties icon, you can choose to use the fixed task order (as defined) or randomize the task order each time the block is executed.
A new block can be added using the "New Block" icon and renamed using the "pen" icon.
Within a block, a task can be assigned to the block via the "add task" icon and removed using the "delete" icon. In order for a block to be shown in the experiment, it must be assigned to a session. It is possible to assign one block to multiple sessions or the same block to one session multiple times.
Using the gear icon in the top right corner of a block in the Study Design tab, users can choose if the order of tasks for that block should be fixed or randomized. If randomized, the block will appear in the order that it is shown, but the tasks within the specified block will be shuffled for each participant.
To simplify formatting while increasing the complexity of experiments, users can implement a Randomization Separator between Blocks of the study. The separator is a black bar that can be added by clicking the green plus sign at the bottom of a block in the Study Design tab. The bar will appear below the last task of the selected block. This can be done in the Blocks column to randomize the order of trials or in the Sessions column to randomize the order of Blocks. Simply add two Randomization Separators and place them above and below the aspects that should be randomized. This feature simplifies between-subjects randomization for more complex experiments.