### Abstract

This research was designed to develop the definition of effective target width in a two-dimensional pointing task. The idea of effective target width in a one-dimensional pointing task was extended to effective target width in a two-dimensional pointing task using the two-dimensional joint probability density function. The validity of this theoretical definition was empirically verified. In the experiment, the moving direction of the mouse was from lower left to upper right. The approach angle was fixed to 45°. The fit of conventional and new models to the experimental data was compared by means of contribution of the regression line which showed the relationship between the index of difficulty and the mean pointing time. As a result, we could obtain higher values of contribution for the modelling that introduced effective target width than that for the conventional modelling without it. In conclusion, the proposed two-dimensional definition of effective target width may be promising for predicting and modelling pointing time in human-computer interactions.

Original language | English |
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Title of host publication | Proceedings of the IEEE International Conference on Systems, Man and Cybernetics |

Publisher | IEEE |

Volume | 2 |

Publication status | Published - 1999 |

Externally published | Yes |

Event | 1999 IEEE International Conference on Systems, Man, and Cybernetics 'Human Communication and Cybernetics' - Tokyo, Jpn Duration: Oct 12 1999 → Oct 15 1999 |

### Other

Other | 1999 IEEE International Conference on Systems, Man, and Cybernetics 'Human Communication and Cybernetics' |
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City | Tokyo, Jpn |

Period | 10/12/99 → 10/15/99 |

### Fingerprint

### ASJC Scopus subject areas

- Hardware and Architecture
- Control and Systems Engineering

### Cite this

*Proceedings of the IEEE International Conference on Systems, Man and Cybernetics*(Vol. 2). IEEE.

**Proposal of two-dimensional effective target width in Fitts' Law.** / Murata, Atsuo; Iwase, Hirokazu.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings of the IEEE International Conference on Systems, Man and Cybernetics.*vol. 2, IEEE, 1999 IEEE International Conference on Systems, Man, and Cybernetics 'Human Communication and Cybernetics', Tokyo, Jpn, 10/12/99.

}

TY - GEN

T1 - Proposal of two-dimensional effective target width in Fitts' Law

AU - Murata, Atsuo

AU - Iwase, Hirokazu

PY - 1999

Y1 - 1999

N2 - This research was designed to develop the definition of effective target width in a two-dimensional pointing task. The idea of effective target width in a one-dimensional pointing task was extended to effective target width in a two-dimensional pointing task using the two-dimensional joint probability density function. The validity of this theoretical definition was empirically verified. In the experiment, the moving direction of the mouse was from lower left to upper right. The approach angle was fixed to 45°. The fit of conventional and new models to the experimental data was compared by means of contribution of the regression line which showed the relationship between the index of difficulty and the mean pointing time. As a result, we could obtain higher values of contribution for the modelling that introduced effective target width than that for the conventional modelling without it. In conclusion, the proposed two-dimensional definition of effective target width may be promising for predicting and modelling pointing time in human-computer interactions.

AB - This research was designed to develop the definition of effective target width in a two-dimensional pointing task. The idea of effective target width in a one-dimensional pointing task was extended to effective target width in a two-dimensional pointing task using the two-dimensional joint probability density function. The validity of this theoretical definition was empirically verified. In the experiment, the moving direction of the mouse was from lower left to upper right. The approach angle was fixed to 45°. The fit of conventional and new models to the experimental data was compared by means of contribution of the regression line which showed the relationship between the index of difficulty and the mean pointing time. As a result, we could obtain higher values of contribution for the modelling that introduced effective target width than that for the conventional modelling without it. In conclusion, the proposed two-dimensional definition of effective target width may be promising for predicting and modelling pointing time in human-computer interactions.

UR - http://www.scopus.com/inward/record.url?scp=0033324818&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033324818&partnerID=8YFLogxK

M3 - Conference contribution

VL - 2

BT - Proceedings of the IEEE International Conference on Systems, Man and Cybernetics

PB - IEEE

ER -