@patent {609453,
	title = {Management of Off-Task Time in a Participatory Environment },
	volume = {US 9,965,972 B2},
	number = { U.S Patent and Trademark Office},
	year = {2018},
	edition = {United States of America},
	chapter = {US},
	abstract = {Participatory activity carried out using electronic devices is enhanced by occupying the attention of participants who complete a task before a set completion time. For example, a request or question having an expected response time less than the remaining answer time may be provided to early-finishing participants. In another of the many embodiments, the post-response tasks are different for each participant, depending upon, for example, the rate at which the participant has successfully provided answers to previous questions. This ensures continuous engagement of all participants.},
	author = {Gary King and Lukoff, Brian and Eric Mazur}
}
