ITC504-W5.pdf - 7/14/20 Chapter 14 INTRODUCING EVALUATION 1...

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7/14/201Chapter 14INTRODUCING EVALUATION1AgendaDiscuss key evaluation concepts.Introduce different evaluation methods.Show how different evaluation methods are usedfor different purposes at different stages of thedesign process and in different contexts.Show how evaluators mix and modify methods.Discuss some of the challenges.Look at frameworks for evaluation.22
7/14/20Why, what, where, and whento evaluateIterative design and evaluation is a continuous process that examines:
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7/14/203What is Usability?“Usability is the measure of the quality of auser's experience when interacting with aproduct or system” (Usability.gov, 2006)Some attributes of Usability:– Ease of learning;– Efficiency of use;– Memorability;– Error frequency and severity;– Subjective satisfaction© ; P. White2015556Types of evaluationControlled settingsinvolving users,eg usability testing & experimentsinlaboratories and living labs.Natural settingsinvolving users, egfield studies to see how the productis used in the real world.Any settings not involving users, egconsultants critique; to predict,analyze & model aspects of theinterface analytics.6
7/14/204Evaluation case studiesA classic experimental investigation into thephysiological responses of players of acomputer gameAn ethnographic study of visitors at the theRoyal Highland show in which participantsare directed and tracked using a mobilephone appCrowdsourcing in which the opinions andreactions of volunteers (for example, from thecrowd) inform technology evaluation77Challenge and engagement ina collaborative immersive gamePhysiological measures were usedPlayers were more engaged when playingagainst another person than when playingagainst a computerWhy was the physiological data collectednormalized?88
7/14/205Physiological data ofparticipants in a videogame9Source: Mandryk and Inkpen (2004), “The Physiological Indicators for the Evaluation of Co-located Collaborative Play,”CSCW’2004, pp 102-111. Reproduced with permission ofACMPublications.

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Usability, heuristic evaluation, P White

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