The buttons response construct is a container that can house one or more buttons to record values and actions, and move the study forward.
Buttons responses can be added to instructions, questionnaires and trials timelines. To add a keyboard response to a trials timeline, click New item. To add a buttons response to instructions or questionnaires, click New response. Select
Response - buttons from the type list and select one of the following creation options:
New: create a new buttons response.
Copy: copy another buttons response from the current study.
Clone (from a different trial): clone another buttons response (trials timeline only).
If the buttons response is a sub-construct of trials:
Click anywhere along its row (Figure 1) to open the editor.
In edit mode, click Delete on the button row you wish to remove.
WARNING: Deleting a button will also delete any trials rules related to that button.
When two or more buttons are present, you can randomize their layout order from inside the editor (Figure 3) by selecting
For example, in Figure 3, two buttons are assigned:
When randomization is enabled, False will be randomly allocated to either leftmost or rightmost placement and True will be randomly allocated to one of the positions that remain (in this case there will be only one). Randomization remains consistent across all trials.
In order to maintain the same button order across multiple trial procedures and/or multiple trial blocks, you can clone a buttons response on the trials timeline to keep a consistent layout across all buttons. So for example, if a randomized button layout produced the layout as seen in Figure 3 above (False on the left, True on the right) every
Response - buttons in every trial block and trial procedure in the entire experiment will contain the same layout (False left, True right) when using a clone.
Response - buttonstype (Figure 4)
Clone (from a different procedure)creation option (Figure 4)
In edit mode, the following properties can be set via the timing table:
Fixed: start time will be measured from the beginning of the trials timeline.
Offset from previous item: start time will be measured from the end of the previous item on the trials timeline. If there is no previous item, or the timeout of the previous item is set to
nil(infinite), then start time will be measured from the beginning of the trial.