Computer Science

A Fitts’ Law Evaluation of Hands-Free and Hands-On Input on a Laptop Computer

Document Type

Conference Paper

Abstract

We used the Fitts’ law two-dimensional task in ISO 9241-9 to evaluate hands-free and hands-on point-select tasks on a laptop computer. For the hands-free method, we required a tool that can simulate the functionalities of a mouse to point and select without having to touch the device. We used a face tracking software called Camera Mouse in combination with dwell-time selection. This was compared with three hands-on methods, a touchpad with dwell-time selection, a touchpad with tap selection, and face tracking with tap selection. For hands-free input, throughput was 0.65Â bps. The other conditions yielded higher throughputs, the highest being 2.30Â bps for the touchpad with tap selection. The hands-free condition demonstrated erratic cursor control with frequent target re-entries before selection, particularly for dwell-time selection. Subjective responses were neutral or slightly favourable for hands-free input.

Publication Title

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Publication Date

2019

Volume

11573 LNCS

First Page

234

Last Page

249

ISSN

0302-9743

ISBN

9783030235628

DOI

10.1007/978-3-030-23563-5_20

Keywords

dwell-time selection, face tracking, Fitts’ law, hands-free input, ISO 9241-9

APA Citation

Hassan, M., Magee, J., & MacKenzie, I. S. (2019). A Fitts’ law evaluation of hands-free and hands-on input on a laptop computer. In Universal Access in Human-Computer Interaction. Multimodality and Assistive Environments: 13th International Conference, UAHCI 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Orlando, FL, USA, July 26–31, 2019, Proceedings, Part II 21 (pp. 234-249). Springer International Publishing.

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