Information Technology Reference
In-Depth Information
10.8 Exercises
10.1 Redraw Fig.
10.3
, the event tree, for errors when entering a purchase on a
smartphone or other mobile device. You can make (and may need to make)
assumptions about the application and about people. Note these assumptions,
and note briefly what studies or references you would need to read to find out
more accurate answers.
10.2 Interact through several transactions with an online commerce site, such as
abebooks.com, or an online library, or other online service that delivers
information. Keep a log of errors you make using a keystroke logger, an
observer, or video. Analyze these errors for frequency and type using two
different taxonomies.
10.3 What are the error rates while typing? When you read a finished document,
it looks like there are none. In this exercise, gather some data on error rates
while typing. You can do this in several ways. You could ask people to type
without looking at what they are typing. This would give an uncorrected
error rate. You could show them a paper to type, and check how many letters
are different between the source and their typing (using the Unix 'diff' tool,
or using Word's compare documents). You could also set up a web page and
see how many times a user clicks on the correct link when asked. In your
analyses you should consider what errors are more common, and what may
lead to increased errors.
10.4 In 2009 a man drove his $1 million Bugatti Veyron car into a lake. He blamed
it on dropping his cell phone. Extend the fault tree in Fig.
10.4
to include the
effect of cell phones on accidents. To do this, you will have to note where cell
phones will interact with driving, and you will have to attempt to provide
quantitative measures of how often events happen with a cell phone.
References
Air Accidents Investigation Branch. (1989). Report on the accident to Boeing 737-400- G-OBME
near
Kegworth,
Leicestershire.
Retrieved
8
March
2014,
from
Arnstein, F. (1997). Catalogue of human error. British Journal of Anaesthesia, 79, 645-656.
Bainbridge, L. (1987). Ironies of automation. In J. Rasmussen, K. Duncan, & J. Leplat (Eds.),
New technology and human error (pp. 271-283). Chicester: John Wiley.
Baxter, G. D. (2000). State misinterpretation in flight crew behaviour: An incident-based
analysis. Unpublished PhD Thesis, University of Nottingham.
Besnard, D., Greathead, D., & Baxter, G. (2004). When mental models go wrong. Co-occurrences
in dynamic, critical systems. International Journal of Human-Computer Studies, 60(60),
117-128.
Bogner, M. S. (Ed.). (2004). Misadventures in health care. Mahwah, NJ: Erlbaum.
Chappell, S. L. (1994). Using voluntary incident reports for human factors evaluations. In N.
Johnston, N. McDonald, & R. Fuller (Eds.), Aviation psychology in practice (pp. 149-169).
Aldershot, UK: Avebury.
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