5. usability testing
a process that employs people as testing
participants who are representative of the
target audience to evaluate the degree to
which a product meets specific usability
criteria.
Handbook of usability testing 2nd Ed., J. Rubin and D. Chisnell
24. field vs. lab
It’s Worth the Hassle! The Added Value of Evaluating the Usability of Mobile Systems in the Field
C.M. Nielsen, M. Overgaard, M.B. Pedersen, J. Stage, S. Stenild - NordiCHI 2006
25. experts disagree
according to our study there was no
difference in the number of problems that
occurred in the two test settings. Our
hypothesis that more problems would be
found in the field was not supported
Usability Testing of Mobile Applications: A Comparison between Laboratory and Field Testing
A. Kaikkonen, T. Kallio, A. Kekäläinen, A. Kankainen, M. Cankar - Journal of Usability Studies, 2005
26. experts disagree
evaluations conducted in field settings can
reveal problems not otherwise identified
in laboratory evaluations
It’s Worth the Hassle! The Added Value of Evaluating the Usability of Mobile Systems in the Field
C.M. Nielsen, M. Overgaard, M.B. Pedersen, J. Stage, S. Stenild - NordiCHI 2006
27. but they all agree
evaluations in the field (are) more
complex and time-consuming
It’s Worth the Hassle! The Added Value of Evaluating the Usability of Mobile Systems in the Field
C.M. Nielsen, M. Overgaard, M.B. Pedersen, J. Stage, S. Stenild - NordiCHI 2006
testing in the field requires double the
time in comparison to the laboratory
Usability Testing of Mobile Applications: A Comparison between Laboratory and Field Testing
A. Kaikkonen, T. Kallio, A. Kekäläinen, A. Kankainen, M. Cankar - Journal of Usability Studies, 2005
31. !"#$%& '&()"*+,-*.//$0,1*")(2
US Mobile Data Market Update Q4 2010 and 2010, Chetan Sharma Technology & Strategy Consulting
http://www.chetansharma.com/usmarketupdate2010.htm
"$$89::;;;<="#$%&,"%)*%<=+* 67 !"!"#$%&'("%)*%'!+&,-.$/&01' 2..'3/0"$,'3#,#)4#5 #$%&"'())
32. remember ...
do not test over wi-fi
cover participants’ data costs
33. tsdohoeaygtrtwt
dut = (mut + afec)
where:
dut = desktop usability testing
mut = mobile usability testing
afec = a few extra challenges
tsdohoeaygtrtwt = the small
detail of how on earth are you
going to record the whole thing
35. 4 approaches to the
small detail of how on earth
are you going to record the whole thing
36. 1. wearable equipment
.
Methods and techniques for field-based usability testing of mobile geo-applications, I. Delikostidis (2007)
International Institute for Geo-Information Science and Earth Observation (Enschede, The Netherlands)
38. but ...
difficult and time-consuming to set up
intrusive, uncomfortable and heavy
39. 2. screen-capture applications
UsabilityExpo by Digia for S60 3rd and 5th ed, WinMo 6.1+ and Maemo 5
http://www.digia.com/C2256FEF0043E9C1/0/405001348
45. Google
Towards the Perfect Infrastructure for Usability Testing on Mobile Devices
R. Schusteritsch, C.Y. Wei, M. LaRosa - Google (CHI 2007)
46. Nielsen Norman
Elmo TT-02RX Teachers Tool
document camera with autofocus
controlled remotely from a laptop
records screen and fingers
webcam records both video streams
participant’s face fed onto a laptop and
recorded with Morae
Photo from Nielsen Norman Mobile Usability workshop handout (London, 22 May 2009)
52. 4a. ready-made mounted devices
Mobile Device Camera by Tracksys
http://www.tracksys.co.uk/product-
details.php?id=9
Mobile Device Camera by Noldus
http://www.noldus.com/human-behavior-
research/accessories/mobile-device-camera-
mdc#
53. 4b. DIY mounted devices
Little Springs Design
http://www.littlespringsdesign.com/blog/2008/Jun/usability-
testing-for-mobile-devices-2/
54. 4b. DIY mounted devices
Little Springs Design Nick Bowmast http://www.bowmast.com/mob-device-cam/
http://www.littlespringsdesign.com/blog/2008/Jun/usability-
testing-for-mobile-devices-2/
55. 4b. DIY mounted devices
Little Springs Design Nick Bowmast http://www.bowmast.com/mob-device-cam/
http://www.littlespringsdesign.com/blog/2008/Jun/usability-
testing-for-mobile-devices-2/
Usability Sciences
http://www.usabilitysciences.com/services/lab-
based-usability-testing/mobile-usability-testing
56. 4b. DIY mounted devices
Little Springs Design Nick Bowmast http://www.bowmast.com/mob-device-cam/
http://www.littlespringsdesign.com/blog/2008/Jun/usability-
testing-for-mobile-devices-2/
Google
Towards the Perfect Infrastructure
for Usability Testing on Mobile Usability Sciences
Devices, R. Schusteritsch, C.Y. Wei, http://www.usabilitysciences.com/services/lab-
M. LaRosa - Google (CHI 2007) based-usability-testing/mobile-usability-testing
60. and ...
if bulky they can prevent single-hand
use
if heavy they can become tiring during
long tests
61. easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
62. easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face & fingers
gives enough video quality
63. easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face & fingers
gives enough video quality
81. a task
You are planning a visit to the Denver
Zoo after this (great) session.
Go to www.denverzoo.org and find out
which bus number will bring you to the
zoo from the Colorado Convention
Centre.
84. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
85. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
86. 15-model meccano set 18.33
Hue HD webcam 28.94
Philips webcam 52.08
additional meccano parts 4.90
blu tack 0.98
jubilee clips (x2) 1.55
USB cable 8.99
screwdriver 5.99
CamStudio 0.00
total (in GBP) 121.76
88. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
89.
90.
91.
92.
93.
94. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
95. weight: 125 grams
an iPhone weighs 137 grams
an iPad weighs 680 grams
I weigh 55,000 grams
a blue whale weighs 136,400,000 grams
96. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
100. Nokia N900
slider
touchscreen
with qwerty
keyboard
101.
102. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
103.
104.
105.
106. b&b’s
easy to put together
cheap
repeatable
allows holding the device
allows one-handed use
supports all form factors
runs tests with participants’ phones
captures screen, face and fingers
gives enough video quality
107. we expect much of our buildings: they
need to have firm foundations, solid
structures, pleasing aesthetics. We should
expect the same of emerging mobile
systems.
Mobile Interaction Design, M. Jones and G. Marsden (2005)