Effects of supervisory train control technology on operator attention.
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2005-07-31
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Abstract:This report describes an experiment evaluating the effects of supervisory control automation on attention allocation while operating ; a train. The study compared two levels of supervisory control (partial and full) to manual control, in terms of how it affects ; vigilance detection and situation awareness. Human performance was measured using a human-in-the-loop train simulator. To ; evaluate vigilance, participants were asked to detect two types of automation failures and react to obstructions on the track. ; Situation awareness was measured using the Situation Awareness Global Assessment Technique (SAGAT) in which the simulation ; was suspended at periodic intervals and the subjects answered questions about the system. These answers were compared to ; objective measures of system performance. ; Attention allocation varied with the method by which supervisory control was implemented. In particular, attention allocation for ; speed control, a critical piece of information, varied with the two methods. Partial supervisory control, as implemented in this ; experiment, resulted in a narrowing of attention. The primary focus was on speed information. By contrast, use of full supervisory ; control resulted in participants spreading their attention more broadly, but at the expense of speed information.
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Main Document Checksum:urn:sha-512:96eb73b0b290c8f4f5ba6e7f9ac297b18e2999f721ab527c909a0126986a0a59611762c104c03a87e41192407bc80865f919f7db2045945a8002ecc7301b44ff