Split display from one Mwork session

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1

Hello Chris,

I am considering setting up a split display for the two subjects sitting in front of two separate monitors (one monitor for each subject). Then there are two stages in a single trial (e.g., one random-dot motion trial): the discrimination and choice stages. Each monitor displays an identical stimulus in the discrimination stage, and only one subject can insert control input to make any change in the trial. At the choice stage, distinctive visual stimuli are displayed at each monitor, reflecting each subject’s choice.

For my purpose, a single Mworks app in a computer should be available to project identical visual stimuli at one of the task stages whereas two separate visual stimuli in another stage. I don’t know whether the Mwork can handle this case.

If you can provide a solution or guidance, that would be great. Thank you.

Best,
Michael

2

Hi Michael,

MWorks doesn’t support multiple independent stimulus displays, nor does it support splitting a single logical stimulus display across multiple physical displays. The primary issue is that the refresh cycles of the two displays aren’t synchronized, so it’s not possible to efficiently render and present a single stimulus display frame that spans both physical displays.

There’s more info in this discussion. The solution of using a Matrox DualHead2Go would probably work for your scenario, too. However, it’s not clear that those devices are still being manufactured, as availability on Amazon seems scant. It’s possible that another company makes something similar, but my brief search didn’t uncover any.

Cheers,
Chris