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External stimulus synchronize

All,
I would like to know if it is possible to synchronize a slider presentation with an external stimulus. In my study, the participant will be exposed to some plastic boards. They will have to evaluate some parameters and then respond in a slider on the screen. These boards will be displayed one at a time by a turntable and I would like to know how I can synchronize the board presentation with the on-screen slider. It will be possible?

Many thanks
Rosane Sampaio