Emails sent immediately after survey completed Subject: Smartphone Use & Sleep Study

Emails sent immediately after survey completed

Subject: Smartphone Use & Sleep Study – Thankyou for participating!

Control & Excluded

Hi there!

Thankyou for participating in the first stage of the Smartphone Use and Sleep study.

Please continue to use your smartphone as you normally would over the next week, and do not change any of the phone’s light settings from what you normally use.

We’ll be in touch again in 7 days time to see how you’re going!

Kind regards,

GDP Coordinators

Experimental

Hi there!

Thankyou for participating in the first stage of the Smartphone Use and Sleep study.

Please be sure to adjust your smartphone settings now, if you have not already, so that your Blue Light Filter application is scheduled to turn on from 7pm in the evening to 7am the following morning.

Click here for step-by-step instructions on how to use the Blue Light Filter

Other than that, continue to use your smartphone as you normally would over the next week, and we’ll be in touch again in 7 days time to see how you’re going!

Kind regards,

GDP Coordinators

Follow up email sent 6 days after survey completed

Subject: Smartphone Use & Sleep Study – Follow up survey

All

Hello again,

About a week ago you completed the first stage of the Smartphone Use and Sleep study and it’s almost time to check in again.

If you’re willing to complete the second stage of the study, you can find the link to the follow up survey below. Please complete the second set of measures exactly 7 days after you completed the first survey, so on the same day and around the same time of day.

Smartphone Use & Sleep – Follow up survey

We very much appreciate your ongoing participation in the study!

Kind regards,

GDP Coordinators