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2015 | OriginalPaper | Buchkapitel

Fitts’ Throughput and the Remarkable Case of Touch-Based Target Selection

verfasst von : I. Scott MacKenzie

Erschienen in: Human-Computer Interaction: Interaction Technologies

Verlag: Springer International Publishing

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Abstract

The method of calculating Fitts’ throughput is detailed, considering task characteristics, the speed-accuracy trade-off, data collection, and data aggregation. The goal is to bring consistency to the method of calculation and thereby strengthen between-study comparisons where throughput is used as a dependent measure. In addition, the distinction between indirect and direct pointing devices is elaborated using the examples of a mouse as an indirect pointing device and a finger as a direct pointing device. An experiment with 16 participants using a smart phone was conducted as an empirical test of direct touch-based target selection. Overall, the throughput was 6.95 bps. This is a remarkable figure – about 50 % higher than accepted values for a mouse. The experiment included task type (1D vs. 2D) and device position (supported vs. mobile) as independent variables. Throughput for the 1D task was 15 % higher than for the 2D task. No difference in throughput was observed between the supported and mobile conditions.

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Fußnoten
1
To be clear, the examples are not necessarily wrong. They are given and distinguished only to reveal inconsistencies in the literature.
 
2
A possible exception is the stylus. Performance with a stylus is generally as good as, or sometimes slightly better than, a mouse [11].
 
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Metadaten
Titel
Fitts’ Throughput and the Remarkable Case of Touch-Based Target Selection
verfasst von
I. Scott MacKenzie
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-20916-6_23

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