Ergonomic study on human movement

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» Movement transformation
on multi-touch devices:
Intuition or instructional
preparation?
Schürmann, T., Binder, C., Janzarik, G., & Vogt, J. (2015).

2. » An inherent shortcoming of touch pads, the user has to be cognitively
aware of one differentiation to touch screens no matter the situation: that
actions will not take place at the same space they were performed.
» PROBLEM: Movement transformation in order to perform an action is
hindered by this obstacle and multi-touch devices can lost appeal to users.
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» INTRO
» 01/XX

3. » Both multi-touch and traditional input devices are subject to the
same levels of action regulation on the side of the user:
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» INTRO
» 01/XX

4. » If the desire is not accomplished, the user will apply transformation of
movement variables.
» Authors take the view that the difference between area of execution and
area of effect could be a key issue in learning how multi-touch functionality
does not work as well on touch pads than it does on touch screens.
» The purpose of the article is to study the effects of differing areas of
execution X areas of effect, solely for touch pad devices.
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» OBJECTIVE
» 01/XX

5. » Research questions were stated as 3 hypothesis:
1) First, participants were hypothesized to use more multi-touch
gestures on a touch pad if they experienced a more “informative”
instructional condition.
2) Second, participants in more informative instructional conditions
assign higher ratings of intuition and usability to the trackpad.
3) Third, prior experience with touch screens and posits that there is
no significant correlation between touch screen experience and the
use of multi-touch gestures.
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» QUESTIONS
» 01/XX

6. » The participants were randomly assigned to one of three
instructional conditions regarding the trackpad: the first one gave
no functional instruction at all. The second condition involved a
standardized, text-based instruction describing the available
functions and proper gestures to trigger them. Finally, a video
instruction showed participants how to perform the manipulation
they wanted to achieve by showing hand movement on the track-
pad and interface reaction simultaneously.
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» METHOD
» 01/XX

7. » 1) Participants first had to find a map of Dubai in an array of
unrelated pictures on an image hosting platform. Them 2) search
for the Dubai International Airport, and 3) find a public transport line
to a industrial area and them back to the city.
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» METHOD
» 01/XX

8. » H1 (CHI2)
The results for this hypothesis show that multi-touch gestures are
more frequently used after the participant is exposed to either text-
based or video levels of instruction, showing the effect of the
gesture more clearly than instruction levels with less information.
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» Results
» 01/XX

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» Results
» 01/XX

10. » H2 (ANOVA) via AttrakDiff questionnaire (measure attractiveness
through usability and appearance)
Results indicate that the instructional condition does influence the
perception of the Trackpad.
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» Results
» 01/XX

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» Results
» 01/XX

12. » H3 (Simple Questionnaire)
No prior experience with said direct devices turned out to be
significantly correlated to gesture usage.
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» Results
» 01/XX

13. » Hypothesis 1 has shown that multi-touch gestures are not used
without any further instruction, which contradicts the notion of indirect
multi-touch devices being intuitive in their application.
» Hypothesis 2 has shown that the assessment of device qualities is
dependent on complete functionality utilization.
» Hypothesis 3 validated our distinction between direct and in-direct multi-
touch devices by pointing out that prior experience with direct multi-
touch devices is not correlated to either gesture usage or product
assessment.
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» Discussion
» 01/XX