If you want to restrict participation to certain devices you can indicate that only desktop/laptop is allowed, then we communicate this to our participants. 

However, this is not enforced automatically, they could still access the study via phone or table. (This is different from the prescreening options).

 

One way of ensuring that participants only use their computers (for example) is to set this up in your survey software. For example Qualtrics offers this functionality, so if you're using it, you could set it up via display logic and device type (https://www.qualtrics.com/support/survey-platform/survey-module/question-options/display-logic/).

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