Stephen Trent’s research while affiliated with Washington State University and other places

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Publications (2)


The design and experimental evaluation of a tool to support the construction and wizard-of-oz testing of low fidelity prototypes
  • Conference Paper

September 2008

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24 Reads

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12 Citations

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Stephen Trent

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Anzor Balkar

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Mohamed Nuur

Because they are easy to create and modify, low fidel- ity prototypes are commonly used in early evaluations of user interface designs. Designers typically use either pen- and-paper or various computer-based tools to create and test low fidelity prototypes. However, our informal analy- ses of these technologies indicate that they do not opti- mally support the two key, complementary tasks of (a) prototype creation and (b) wizard-of-oz testing. To ad- dress this problem, we have developed WOZ PRO, a pen- based software environment for the quick and easy crea- tion and testing of low fidelity user interface prototypes. When designing interface screens in WOZ PRO, designers can easily (a) propagate a design change to other related screens, and (b) specify the set of screens that are reach- able from a given screen. In a wizard-of-oz test, WOZ PRO reduces the cognitive load on the wizard by allowing navigation only to those next screens that are valid. An experimental comparison of WOZ PRO and pen-and- paper provides evidence of WOZ PRO's potential, and insight into how the design of WOZ PRO might improved.


ACM 1-xxxxxxxxxxxxxxxxxx. WOZ Pro: A Pen-Based Low Fidelity Prototyping Environment to Support Wizard of Oz Studies

April 2007

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703 Reads

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14 Citations

Because they are easy to create and modify, low fidelity prototypes are commonly used in early evaluations of user interface designs. Designers typically use either pen-and-paper or various computer-based tools to create and test low fidelity prototypes; however, our informal analyses of these existing technologies indicate that they do not optimally support the two key, complementary tasks of (a) prototype creation and (b) wizard of oz testing. To address this problem, we have been developing WOZ Pro (Wizard of Oz Prototyper), a pen-based software environment for the quick and easy creation and testing of low fidelity user interface prototypes. We are designing WOZ Pro to be as easy to use as pen-and-paper, but to hold key advantages over pen-and-paper and existing computer-based tools. When designing interface screens in WOZ Pro, designers can easily (a) propagate a design change to other related screens, and (b) specify the set of screens that are reachable from a given screen. In a wizard of oz test, WOZ Pro reduces the cognitive load on the wizard by allowing navigation only to those next screens that are valid. We are planning a controlled experiment to compare WOZ Pro against paper-and-pencil along several measures in a set of prototype creation and evaluation tasks.

Citations (2)


... The EMPATHIC WOZ Platform. Several researchers have worked on WOZ tools before (e.g., [5,9,13,16,19,32,38]), but only few of those tools are openly available for implementation and adaption. One such tool is the WebWOZ Wizard of Oz Prototyping Platform [29] 16 , which has already been employed by a number of previous projects (e.g., vAssist [30], Roberta Ironside [15]). ...

Reference:

The EMPATHIC Project: Mid-term Achievements
ACM 1-xxxxxxxxxxxxxxxxxx. WOZ Pro: A Pen-Based Low Fidelity Prototyping Environment to Support Wizard of Oz Studies
  • Citing Conference Paper
  • April 2007

... Interaction designers' sketch tools have been discussed in a similar light. Hundhausen and colleagues (Carter and Hundhausen, 2010;Hundhausen et al., 2008) for instance find a lack of interactivity in sketch tool products. As a comment to the above review of systems for operators' support, this paper is concluded with an account of the first author's trials with GUI interventions in information kiosks. ...

The design and experimental evaluation of a tool to support the construction and wizard-of-oz testing of low fidelity prototypes
  • Citing Conference Paper
  • September 2008