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The effects of protoype medium on usability testing.

Chase Boothe¹, Lesley Strawderman, Ethan Hosea

¹Department of Industrial and Systems Engineering, Mississippi State University, PO Box 9542, Mississippi State, MS 39762, USA.

Applied Ergonomics

|May 15, 2013

Summary

Interface medium does not affect usability testing, but higher fidelity interfaces may improve flaw detection for specific applications. Early usability testing is crucial, regardless of medium fidelity.

Keywords:

Fidelity Human computer interaction Perception Prototype Usability

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Area of Science:

Human-Computer Interaction
Software Engineering
Usability Engineering

Background:

Previous usability testing research shows inconsistencies in methods and results.
Understanding the influence of interface medium on usability flaw detection is critical for effective testing.

Purpose of the Study:

To investigate how interface medium affects users' ability to detect usability flaws.
To examine the impact of interface medium on perceptions of usability and problem detection.

Main Methods:

A systematic usability testing framework was employed.
Users' abilities to detect usability problems and severe usability problems were assessed across different interface mediums.

Main Results:

Interface medium did not significantly affect users' ability to detect usability problems or their perceptions of usability.
An interaction effect was found: users detected more flaws on higher fidelity mediums for a specific application.
Increased user perception of an application's usability correlated with a decreased ability to detect usability problems.

Conclusions:

Interface medium generally has no impact on usability problem detection.
Early usability testing is recommended, even with low-fidelity mediums, to identify potential issues.
The fidelity of the interface medium can influence flaw detection depending on the application.