Table 1.

Participant reimbursement/visit schedule (in USD).

	Intake	Week 1	Week 2	Week 3	Week 4	Total
Baseline visit	$10
ACASI	$20	$20			$20
EMAa		$25/$50	$25/$50	$25/$50	$25/$50
Close out					$10
Smartphone returnb					$50/$100
Total	$30	$45-$70	$25-$50	$25-$50	$105-$180	$230-$380

^aParticipants were paid US $50 every week for answering 80% of their alarms or US $25 every week for answering 60% of their alarms. They received no bonus for answering less than 60% of their alarms or if their phone was uncharged.

^bParticipants received US $100 at close out for returning their original phone or US $50 for returning their replacement. They would be excused from the proposed study if they lost their replacement phone.