Participants maintained a daily sleep journal in which they were asked to record information about the quantity and quality of their sleep. (dreampadsleep.com)
Email reminders continued to be sent every second day to remind participants to complete their daily sleep journal entries and report problems adhering to the sleep hygiene protocol. (dreampadsleep.com)
Sleep journal data were also emailed or mailed to the researchers at study completion. (dreampadsleep.com)