ITEC 3230 Lecture Notes - Heuristic Evaluation, User Interface, Goms

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Published on 17 Apr 2013
School
York University
Department
Information Technology
Course
ITEC 3230
Page:
of 14
INTERACTION DESIGN
Analytical Evaluation: Inspections and Predictive
Models
1
OVERVIEW
Empirical Evaluation
Involves real users
Usability Test: controlled environment
Field Study: natural environment
Analytical Evaluation
Does not involve real users.
Inspections: experience from experts
Predictive/mathematical Models
2
INSPECTIONS
Several Kinds of Inspections in
Information Technology
E.g. code inspections for quality assurance.
In Interface Inspections
Experts use their knowledge of users &
technology to review software usability.
Expert critiques (crits) can be formal or
informal reports.
Heuristic evaluation is a review guided by
a set of heuristics.
Walkthroughs involve stepping through a
pre-planned scenario noting potential
problems. 3

Document Summary

Experts use their knowledge of users & technology to review software usability. Expert critiques (crits) can be formal or informal reports. Heuristic evaluation is a review guided by a set of heuristics. Walkthroughs involve stepping through a pre-planned scenario noting potential problems. Based on heuristics distilled from an empirical analysis of 249 usability problems. These heuristics have been revised for current technology. Heuristics being developed for mobile devices, wearables, virtual worlds, etc. Design guidelines form a basis for developing heuristics. Help users recognize, diagnose, recover from errors. Briefing session to tell experts what to do. Take one pass to get a feel for the product; Take a second pass to focus on specific features. Debriefing session in which experts work together to prioritize problems. Not be too many (>10) to remember. Not be too few (<5) to be difficult to discriminate. Heuristic evaluation is referred to as discount evaluation when many evaluators are used.