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Steven H. Lewis

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Publication statistics

Pub. period:1988-1997
Pub. count:4
Number of co-authors:6

Co-authors

Number of publications with 3 favourite co-authors:

David Ross:1
Gaye Cataldo:1
Harry E. Blanchard:1

Productive colleagues

Steven H. Lewis's 3 most productive colleagues in number of publications:

David R. Millen:45
Harry E. Blanchard:9
Allen E. Milewski:7

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May 20

CTS 2013 - The 2013 Intl. Conf. on Collaboration Techn. and Systems

May 22

Knowing (by) Designing 2013

May 27

13th Intl. Conf. on New Interfaces for Musical Expression

May 19

“ Design can be art. Design can be aesthetics. Design is so simple, that's why it is so complicated. ”

-- Paul Rand, 1997

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Steven H. Lewis

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Publications by Steven H. Lewis (bibliography)

1997

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Milewski, Allen E. and Lewis, Steven H. (1997): Delegating to Software Agents. In International Journal of Human-Computer Studies, 46 (4) pp. 485-500.

“There is currently a great deal of interest in the development of intelligent agents. While there is little agreement on exactly what constitutes an intelligent agent, many definitions embody a user-interface model that differs from the traditional one where users perform tasks with the help of computer-based "tools". In contrast, the "delegation" model associated with agents is based on entrusting tasks to an autonomous, sometimes anthropomorphized system, whose performance is monitored and evaluated. This change in user-interface model is a dramatic one since delegation can be a difficult and often-avoided behavior in humans. Agent-interface designs need to overcome well-established drawbacks in delegation. For this purpose, designers should find the management sciences and organizational psychology literatures to be as relevant as that of traditional human factors. This paper describes issues regarding task delegation as they pertain to the design of intelligent-agent-user interfaces.”

1993

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Blanchard, Harry E., Lewis, Steven H., Ross, David and Cataldo, Gaye (1993): User Performance and Preference for Alphabetic Entry from 10-Key Pads: Where to Put Q and Z?. In: Proceedings of the Human Factors and Ergonomics Society 37th Annual Meeting 1993. pp. 225-229.

“The numeric keys on the keypads of devices such as telephones and point of sale terminals have the letters of the alphabet mapped onto the digits 2-9, except for Q and Z, which are missing. The international standards bodies CCITT and ISO/IEC are standardizing the placement of letters on 10-digit keypads, and must decide where to place Q and Z. Two alternatives have been considered: placing Q and Z in alphabetic order on the 7 and 9 keys, respectively, or placing Q and Z on the 1 key. A study was conducted to determine if one of these alternatives is to be preferred on the basis of human keying performance and/or preferences. Performance differences were too small to conclude that one alternative should be preferred, however, the majority of users clearly indicated a preference for alphabetic order. A nation-wide preference and usage survey among active calling card and bank machine users revealed an overwhelming preference for the alphabetic order. Finally, a summary is given of the current status of the 10-key pad standardization process in CCITT and ISO/IEC.”

1992

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Lewis, Steven H. (1992): Touch-Tone User Interface Standards. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. .

1988

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Bayerl, Jeanne P., Millen, David R. and Lewis, Steven H. (1988): Consistent Layout of Function Keys and Screen Labels Speeds User Responses. In: Proceedings of the Human Factors Society 32nd Annual Meeting 1988. pp. 344-346.

“Personal-computer applications-software often requires people to navigate and select options using their keyboard's function keys where context-dependent meanings for these keys are assigned by guides or menus labeled on the screen. The physical layout of function keys on standard PC-compatible keyboards differs from the most common layouts of screen labels. This study examined user performance consequences of this simple, spatial, inconsistency. In a simulated order entry task, 36 participants each completed 240 trials, 40 with each of six different combinations of two keyboards and three screen guides with different spatial arrangements of function keys and screen labeling. One keyboard used the standard 5x2 function key pad and one used a single horizontal row of function keys; the screen guides were either a horizontal row, a vertical list, or a grid consistent with the standard key pad. We collected measures of response time, errors, and user preferences. Analysis of errors showed no reliable results. Analysis of response times showed several significant effects. Responses were faster with the two combinations of key pad and screen-guide layouts that were spatially consistent than with the four inconsistent layouts. Response times were also faster with the keyboard with horizontal function keys than with the standard layout, and slower with the vertical screen guide than with either of the other two guides. Over 80% of the participants thought the task was easiest when the screen guide matched the function key layout.”

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