Task and Effector Constraints on the Kinematics of Pointing Movements
| Autor: | Shelby Thompson, Daniel S. McConnell, Alex Chaparro, Michael Bohan |
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| Rok vydání: | 2005 |
| Předmět: |
business.industry
Computer science 05 social sciences Cursor (user interface) Visual task Kinematics Target acquisition 050105 experimental psychology Medical Terminology Human–computer interaction 0501 psychology and cognitive sciences Artificial intelligence Fitts's law business 050107 human factors Medical Assisting and Transcription Graphical user interface |
| Zdroj: | Proceedings of the Human Factors and Ergonomics Society Annual Meeting. 49:1545-1548 |
| ISSN: | 1071-1813 2169-5067 |
| Popis: | Michael Bohan, Daniel McConnell, Shelby Thompson and Alex ChaparroDepartment of PsychologyWichita State UniversityWichita, KSRecent work has emphasized the distinction between task and effector constraintsunderlying performance in Fitts’ type discrete pointing tasks. We explored the relativecontributions of these constraints in a cursor-pointing task by manipulating the control-display scale, thereby dissociating movement scale at the level of the hand frommovement scale at the level of the cursor. Using linear regressions to predict movementtime, we found that effector constraints best predict the primary transport phase of themovement, bringing the hand near the target. Visual task constraints underlie thesecondary target acquisition phase of the movement. We present a reformulation of Fitts’(1954) index of difficulty, capturing the relative contributions of effector and visual taskconstraints.INTRODUCTIONThe advent of the graphical user interface,and the development of the mouse as an inputdevice mediating human-computer interaction, hasled to the development of a body of researchdevoted to understanding mousing and cursor-pointing behavior in terms of efficiency. Inparticular, Fitts’ law (Fitts, 1954) has been used todescribe mousing behavior, and has successfullybeen applied to the evaluation of different inputdevices (Card, English & Burr, 1978).In recent years, characteristics of the mouseand/or the on-screen display of cursor movementshave been examined as a means of improving theefficiency of mousing behavior, and potentially“beating” Fitts’ law (see Balakrishnan, 2004, for areview). Fitts’ law describes constraints on thespeed of a pointing movement in terms of twoparameters, as incorporated into an index ofdifficulty ( |
| Databáze: | OpenAIRE |
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