Human-Computer Etiquette

314 Human–Computer etiquette

performance on other tasks. We feel that this is because some of the

participants’ attention resources were freed up when the TNCS took

over the navigation task, and in this situation the resources gained

outweighed the attention resources lost in responding to the tactor

belt’s interruptions.

In the high workload condition, the composite run time (e.g., total

time to run the course with penalties for tripped mines or detection

by enemy surveillance cameras) was signicantly shorter when the

TNCS was used (see Figure12.8). Under unmitigated conditions, all

six participants triggered mines at least four and up to ...