Miller Robotic Interface II Manual de usuario descargar pdf (Pagina 64)

When comparing the number of collisions that occurred, our initial hypotheses were correct.

Interface A had the most collisions, with an average of 8.78 hits per run (standard deviation:

3.72). Interface B had an average of 7.61 hits per run (standard deviation: 3.11) and Interface C

did the best, with an average of 6.00 hits per run (standard deviation: 3.07).

The number of collisions experienced using interface A versus interface B is not significant (p =

0.14). However, the number of hits was significant when comparing both the other interfaces to

interface C. Interface A compared to interface C resulted in p = 0.007 and compared to

interface B, p = 0.041. These results show that interface C was clearly the winner when it came

to the number of collisions that occurred.

This experiment provided very definitive results. We found the data closely matched our initial

hypothesis. Interface C out performed interface A when compared to both time on task as well

as critical events that occurred. Interface C also had significantly fewer hits and yielded

significantly faster run times than interface B.

The total number of collisions that stemmed from this experiment is much larger than the

number of hits we've seen in previous studies. This is not a sign that the newer interface is in

some way inferior, however. As was previously stated, the arenas in this experiment were

extremely narrow and operators were only allowed to be in teleop mode, so a larger number of

total collisions were expected.

One confounder that may need to be studied in the future is that this experiment differed more

than the studies that were carried out with the other interface versions. In this study, the user

went down a path and came back. They did not have to look for victims or get lost in a maze,

which are challenges that the previous studies presented. Therefore, a user may have been more

apt to concentrate on the distance panel more than they would have, because there was no threat

of missing a victim or important landmark in the video. However, the study still shows that the

distance panel with the lines, in interface C, is by far better than the previous one. In the future,

it would be beneficial to perform a study similar to the previous studies conducted on the other

versions of this interface.

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Miller Robotic Interface II Manual de usuario Pagina 64