## How Do I
Present Two or More Visual Stimuli at the Same Time

It is possible to present as many visual stimuli simultaneously as you like. This applies to events of type Picture File and Text. Let’s use an example where four pictures need to be presented at the same time. The basic idea is that the first three pictures must be kept invisible and the fourth one made visible, causing all four to appear at the same time.

Here are step by step details. For the first picture file, in the Event Editor:

- Click on the Input tab and click on the Immediately after the event is presented checkbox to turn it on.

- Click on the Stimulus tab and then click on the Settings… button. A smaller dialog (screen) appears. Note: the Settings… button will be grayed out if you have not selected a picture file yet.

- In the Picture Settings dialog, click on the Presentation Options tab.

- Click on the Keep stimulus invisible checkbox to turn it on.

- Click on OK to close the Picture Settings dialog.

For the second and third events, the settings need to be identical to the first event with one change: in the Picture Settings dialog, the Erase screen before presenting stimulus checkbox must be turned off.

For the fourth and last event, in the Picture Settings dialog the Keep stimulus invisible checkbox must be turned off.

All four events must be linked to the same trial for the simultaneous presentation to work. The same instructions apply if you are presenting words.