Publication statistics

Pub. period:1990-1994
Pub. count:6
Number of co-authors:1



Co-authors

Number of publications with 3 favourite co-authors:

I. H. Sheikh:1

 

 

Productive colleagues

Errol R. Hoffmann's 3 most productive colleagues in number of publications:

I. H. Sheikh:1
 
 
 

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Errol R. Hoffmann

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Publications by Errol R. Hoffmann (bibliography)

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1994
 
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Hoffmann, Errol R. (1994): Movement Times of Right and Left Handers Using Preferred and Non-Preferred Hands. In: Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting 1994. pp. 500-504.

The aim of the present work was to quantify the difference in performance of hands when doing tasks of defined difficulty. Results of five experiments are reported in which strongly lateralised subjects performed movement tasks with their preferred and non-preferred hands. These tasks were (i) ballistic movements (ii) Fitts' task (iii) pin-to-hole transfer (iv) Drury tracking task (v) a modified form of the Drury tracking task in which subjects cut paper with scissors. The results showed that in ballistic tasks there was no significant effect of handedness or of hand used. With visually-controlled tasks, where there was considerable control of accuracy required, the preferred hand generally performed better than the non-preferred hand. There was however no significant difference, in any of the tests, between right and left handers when using their preferred hands. Left handers, in some tasks, performed better with their non-preferred hands than did right handed persons using the non-preferred hand.

© All rights reserved Hoffmann and/or Human Factors Society

1993
 
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Hoffmann, Errol R. (1993): Movement Time to an Array of Controls. In: Proceedings of the Human Factors and Ergonomics Society 37th Annual Meeting 1993. pp. 625-629.

Two tasks in which subjects aim at an array of devices were considered: moving to one knob within an array and moving the finger on a numeric keypad. It was shown by a mathematical model based on Fitts' law, that when the array density is specified for the array of knobs or keys, there is an optimum control size for minimum movement time. The theoretical result was obtained by considering a two-element model of the movement, the first being a reach to the general location of the control and the second describing the insertion of the fingers into the space between adjacent controls. As the first element has a movement time that decreases with increase of control size and the second a time increasing with control size, there is an optimum control size where the movement time is a minimum.

© All rights reserved Hoffmann and/or Human Factors Society

1992
 
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Hoffmann, Errol R. (1992): Fitts' Law with Transmission Delay. In Ergonomics, 35 pp. 37-48.

 Cited in the following chapter:

Fitts's Law: [/encyclopedia/fitts_law.html]


 
1991
 
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Hoffmann, Errol R. and Sheikh, I. H. (1991): Finger Width Corrections in Fitts' Law: Implications for Speed-Accuracy Research. In Journal of Motor Behavior, 23 pp. 259-262.

 Cited in the following chapter:

Fitts's Law: [/encyclopedia/fitts_law.html]


 
1990
 
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Hoffmann, Errol R. (1990): Strength of Component Principles Determining Direction-of-Turn Stereotypes for Horizontally Moving Displays. In: D., Woods, and E., Roth, (eds.) Proceedings of the Human Factors Society 34th Annual Meeting 1990, Santa Monica, USA. pp. 457-461.

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© All rights reserved Hoffmann and/or Human Factors Society

 
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Hoffmann, Errol R. (1990): Strength of Component Principles for Direction-of-Turn Stereotypes of Three-Dimensional Display/Control Arrangements. In: D., Woods, and E., Roth, (eds.) Proceedings of the Human Factors Society 34th Annual Meeting 1990, Santa Monica, USA. pp. 462-466.

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© All rights reserved Hoffmann and/or Human Factors Society

 
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