Miller Robotic Interface II Bedienungsanleitung PDF herunterladen (Seite 44)

environment. The bird’s eye view provided by the map can assist in producing a good mental

model of the environment which leads to good location awareness. One subject began to draw

a map using the paper and pencil, despite the interface displaying the robot generated map. This

user quickly abandoned the idea, saying that it was too difficult to do. In our experience,

drawing a map while controlling the robot is too complicated for most users.

The second subject did not make use of the map at all during the run, but in post-run

questioning, he said “I didn’t really use the map, but looking back on it, it might have been

useful.” One subject commented that showing the robot on the map was useful, but it would be

more useful to show the path the robot had taken to get to its point on the map. Other users

commented that if we showed which side was the front of the robot on the marker, it would be

more valuable. Both of those features were added in future versions of the interface. Every user

commented that the ability to mark the map with victim and landmark locations is necessary.

The first subject claimed to have a good mental model of the arena, but admitted that he forgot

where one of the victims was located.

The subjects in this study showed good SA in various ways. The first subject stated twice that

he was scanning the area. He also said, “[I am] putting myself in the center of the room and

scanning around to see if I can see anything.” This strategy for gaining situation awareness is

common among USAR experts.

At the end of the run, when asked to return to a previously found victim, all of our test subjects

were able to return easily to the chosen victim via the most direct route. Multiple subjects, when

asked to return to a victim, successfully found the victim using landmarking. Landmarking is when

a person remembers where something is located relative to other objects in the world. The

ability to add landmarks to the map would help maintain SA.

Also, as previously stated, there was only one hit in the rear, effectively increasing SA behind the

robot. Seventy percent of the hits recorded in this study took place on the side of the robot.

These incidents occurred either by scraping along the edge of a wall while passing it or turning

into it. As expected, the interface provides excellent SA in the front and rear of the robot, but

the sides are still lacking.

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Miller Robotic Interface II Bedienungsanleitung Seite 44