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Christopher N. Hunter

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Publications by Christopher N. Hunter (bibliography)

1998

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Christoffersen, Klaus, Hunter, Christopher N. and Vicente, Kim J. (1998): A Longitudinal Study of the Effects of Ecological Interface Design on Deep Knowledge. In International Journal of Human-Computer Studies, 48 (6) pp. 729-762.

“Some researchers have argued that providing operators with externalized, graphic representations can lead to a trade-off whereby deep knowledge is sacrificed for cognitive economy and performance. This article provides an initial empirical investigation of this hypothesis by presenting a longitudinal study of the effect of ecological interface design (EID), a framework for designing interfaces for complex industrial systems, on subjects' deep knowledge. The experiment continuously observed the quasi-daily performance of the subjects' over a period of six months. The research was conducted in the context of DURESS II, a real-time, interactive thermal-hydraulic process control simulation that was designed to be representative of industrial systems. The performance of two interfaces was compared, an EID interface based on physical and functional (P+F) system representations and a more traditional interface based solely on a physical (P) representation. Subjects were required to perform several control tasks, including startup, tuning, shutdown and fault management. Occasionally, a set of knowledge elicitation tests was administered to assess the evolution of subjects' deep knowledge of DURESS II. The results suggest that EID can lead to a functionally organized knowledge base as well as superior performance, but only if subjects actively reflect on the feedback they get from the interface. In contrast, if subjects adopt a surface approach to learning, then EID can lead to a shallow knowledge base and poor performance, although no worse than that observed with a traditional interface.”

1995

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Christoffersen, Klaus, Hunter, Christopher N. and Vicente, Kim J. (1995): Ecological Interface Design and Fault Management Performance: Long-Term Effects. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. pp. 496-500.

“This paper presents a six-month longitudinal study of the effects of ecological interface design (EID) on fault management performance. The research was conducted in the context of DURESS II, a real-time, interactive thermal-hydraulic process control simulation that was designed to be representative of industrial systems. Subjects' performance on two interfaces was compared, one based on the principles of EID and another based on a more traditional piping and instrumentation diagram (P&ID) format. Subjects were required to perform several control tasks, including startup, tuning, shutdown, and fault management on both routine and non-routine faults. At the end of the experiment, subjects used the interface that the other group had been using to control the system. The results indicate that there are substantial individual differences in performance, but that overall, the EID interface led to faster fault detection, more accurate fault diagnosis, and faster fault compensation.”

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