Variation in importance of time-on-task with familiarity with mobile phone models

Authors:
Shunsuke Suzuki;Victoria Bellotti;Nick Yee;Bonnie E. John;Yusuke Nakao;Toshiyuki Asahi;Shin'ichi Fukuzumi
Affiliations:
NEC Corporation, Kawasaki, Japan;Palo Alto Research Center (PARC), Palo Alto, California, USA;Palo Alto Research Center (PARC), Palo Alto, California, USA;Carnegie Mellon University, Pittsburgh, Pennsylvania, USA;NEC Corporation, Kawasaki, Japan;NEC Corporation, Ikoma, Japan;NEC Corporation, Kawasaki, Japan
Venue:
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Year:
2011

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Abstract

We studied the extent to which time-on-task is correlated with perception of usability for people who are familiar with a phone model and for those who are not. Our controlled experiment, conducted in Japan, correlated subjective usability assessments with time-on-task for expert and novice users on three different mobile phone models. We found that the correlation between perceived usability and time-on-task is stronger when participants are more familiar with the phone model. While not significant when initially inspecting a new phone model, a negative correlation between time-on-task and perceived usability becomes significant with as little as an hour's time doing tasks on the unfamiliar phone. This suggests that designing the UI to make time-on-task as short as possible may not have much effect on the purchase decision, but as experience increases, it may increase the loyalty of existing users.