Blind people and mobile keypads: accounting for individual differences

Authors:
Tiago Guerreiro;João Oliveira;João Benedito;Hugo Nicolau;Joaquim Jorge;Daniel Gonçalves
Affiliations:
INESC-ID, Technical University of Lisbon, Portugal;INESC-ID, Technical University of Lisbon, Portugal;INESC-ID, Technical University of Lisbon, Portugal;INESC-ID, Technical University of Lisbon, Portugal;INESC-ID, Technical University of Lisbon, Portugal;INESC-ID, Technical University of Lisbon, Portugal
Venue:
INTERACT'11 Proceedings of the 13th IFIP TC 13 international conference on Human-computer interaction - Volume Part I
Year:
2011

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Abstract

No two persons are alike. We usually ignore this diversity as we have the capability to adapt and, without noticing, become experts in interfaces that were probably misadjusted to begin with. This adaptation is not always at the user's reach. One neglected group is the blind. Age of blindness onset, age, cognitive, and sensory abilities are some characteristics that diverge between users. Regardless, all are presented with the same methods ignoring their capabilities and needs. Interaction with mobile devices is highly visually demanding which widens the gap between blind people. Herein, we present studies performed with 13 blind people consisting on key acquisition tasks with 10 mobile devices. Results show that different capability levels have significant impact on user performance and that this impact is related with the device and its demands. It is paramount to understand mobile interaction demands and relate them with the users' capabilities, towards inclusive design.