Component-based usability testing: Difference between revisions

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Revision as of 23:08, 20 October 2015

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==Usability questionnaire==

Whereas holistic oriented usability questionnaires such as [[system usability scale]] (SUS) examine the usability of a system on several dimensions such as defined in [[ISO 9241]] Part 11 standard effectiveness, efficiency and satisfaction, a Component-Based Usability Questionnaire (CBUQ) <ref name="Brinkman2009">Brinkman, W.-P., Haakma, R., & Bouwhuis, D.G. (2009), Theoretical foundation and validity of a component-based usability questionnaire, ''Behaviour and Information Technology'', 2, no. 28, pp. 121 – 137. [http://mmi.tudelft.nl/~willem-paul/WP_Papers_online_versie/The_theoretical_foundation_and_Validity_of_a_component_based_usability_questionnaire_preliminary_version.pdf preliminary version] [http://mmi.tudelft.nl/~willem-paul/mp3player/Intro.htm MP3 example study] {{doi|10.1080/01449290701306510}}</ref>

is a questionnaire which can be used to evaluate the usability of individual interaction components, such as the volume control or the play control of a MP3 player. To evaluate an interaction component, the six Perceived Ease-Of-Use (PEOU) statements from the [[technology acceptance model]] are taken with a reference to the interaction component, instead of to the entire system, for example:

''Learning to operate the Volume Control would be easy for me''.

Users are asked to rate these statements on a seven -point [[Likert scale]]. The average rating on these six statements is regarded as the user's usability rating of the interaction component. Based on lab studies with difficult to use interaction components and easy to use interaction components, a break-even point of 5.29 on seven point Likert scale has been determined.<ref name="Brinkman2009"/> Using a One-sample [[student's t-test]] it is possible to examine whether users' rating of an interaction component deviates from this break-even point. Interaction components that receive rating below this break-even point can be regarded as more comparable to the set of difficult to use interaction components, whereas ratings above this break-even point would be more comparable to the set of easy to use interaction components.

If engineers like to evaluate multiple interaction components simultaneously, the CBUQ questionnaire exists of separate sections, one for each interaction component, each with their own 6 PEOU statements.