Modeling the Effect of Target Shape on Movement Performance in a 1D2D Fitts Task

Chiuhsiang Joe Lin and Chih-Feng Cheng
Additional contact information
Chiuhsiang Joe Lin: Department of Industrial Management, National Taiwan University of Science and Technology, Taipei 106335, Taiwan
Chih-Feng Cheng: Department of Industrial Management, National Taiwan University of Science and Technology, Taipei 106335, Taiwan

Mathematics, 2022, vol. 10, issue 15, 1-18

Abstract: Fitts’ law is used as a performance measurement metric in human–computer interactions. The original formulation implied that movement time was identical for movements with the same value of the index of difficulty under varied movement amplitude and target width. An experiment was designed to test this implication. The result indicates that movement time is related to the index of difficulty when the amplitude is constant. Nowadays, most of the icons in applications are represented as two-dimensional targets. An object of equal width and height is a particular case of a two-dimensional target. This target area could be a factor in a Fitts task and impact the movement time, number of errors, and perceived difficulty. Therefore, the area could replace the target width in the formulation of the index of difficulty. The modified index of difficulty is easy to implement without the complexity of post-calculation. Researchers can design the index of difficulty before the empirical test. This research proposes a modified index of difficulty by varying the target’s area and applying the square-root movement time model simultaneously, which results in an excellent performance with a higher R-square and satisfies the residual normality robustly than the traditional formulation of Fitts’ law.

Keywords: Fitts’ law; information theory; SQRT_MT model; psychological factor; two-dimensional target shape (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2227-7390/10/15/2568/pdf (application/pdf)
https://www.mdpi.com/2227-7390/10/15/2568/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jmathe:v:10:y:2022:i:15:p:2568-:d:869924

Access Statistics for this article

Mathematics is currently edited by Ms. Emma He

More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().