@inproceedings {Simula.SE.156.b,
	title = {Expert Habits Vs. UI Improvements: Re-Design of a Room Booking System},
	journal = {HCI 2007: 21th British HCI Group Annual Conference},
	year = {2007},
	month = {September},
	pages = {51-54},
	publisher = {British Computer Society},
	type = {Conference},
	address = {BCS},
	abstract = {This paper presents a prototyping case aimed to improve user interface (UI) for web-based room booking. Running on a university web site, the existing system has caused much critique among its users. Their expectations for a new UI were increased ease of use, less effort required, and less time consumed. We prototyped a new UI using Visio and it was tested with a small number of experienced and novice users. Our results partly favor the existing system and partly the new one. To our surprise, experienced users performed relatively poorer with the new UI considering their critique of the existing one. We found paper prototyping to be an efficient method to gain user feedback on usability issues and that a low-fidelity prototype does not automatically mean low-effort testing. We observe that visible-state UIs can be demanding to test with paper prototyping.},
	isbn = {978-1-902505-94-7},
	author = {Per A. {Jonasson} and Fjeld, Morten and Yamashita, Aiko},
	editor = {Devina Ramduny-El {Rachovides}}
}
@inproceedings {Simula.SE.156,
	title = {Exploring Potential Usability Gaps When Switching Mobile Phones: an Empirical Study},
	journal = {HCI 2007: 21th British HCI Group Annual Conference},
	year = {2007},
	month = {September},
	pages = {109-116},
	publisher = {British Computer Society},
	type = {Conference},
	address = {BCS},
	abstract = {The study presented explores potential usability gaps when users switch from a familiar to an unfamiliar mobile phone interface. An experiment was performed where nine users familiar with Sony-Ericsson T630 and nine familiar with Nokia 7250 performed tasks on both phones. On average, test subjects spent more time to finish tasks with an unfamiliar phone than with a familiar one. For most tasks, there was no significant difference in completion time between the first-time Nokia users and the first-time Sony-Ericsson users. Only adding a contact to the address book was faster for new Nokia users than for new Sony-Ericsson users. In terms of both completion time and subjective ranking of difficulty, first-time Nokia users found this phone easier to use than first-time Sony-Ericsson users. Potential explanations for these observations are presented and discussed.},
	isbn = {978-1-902505-94-7},
	author = {Yamashita, Aiko and Barendregt, Wolmet and Fjeld, Morten},
	editor = {Linden J. {Ball} and Sasse, Angela and Sas, Corina and Thomas C. {Ormerod} and Dix, Alan and Bagnall, Peter and McEwan, Tom}
}
