HI-600: Analysis and Design of Health Information Systems

Design: Part IIIUser Interface

Principles For User Interface Design

Layout

Principles For User Interface Design

Principles For User Interface Design

USER INTERFACE DESIGN PROCESS

Use Scenario Development

Interface Structure Design

Interface Standards Design• Interface metaphor – the real world

concept• Interface template – general appearance

of all screens, forms, and reports• Interface objects – building blocks of the

system• Interface actions – most common actions• Interface icons – represent objects, actions

and their statuses

Interface Design Prototyping

Storyboard

*http://www.usabilitycounts.com/2013/07/02/need-html-prototyping-resources-heres-my-list/

HTML PrototypeLanguage Prototype

Interface Evaluation• Heuristic evaluation – based on design

principles• Walk-through evaluation – meeting with

the users• Interactive evaluation – users try the

interface• Formal usability testing – almost scientific

Usability

Quality of a user’s experience when interacting with a product or system

• Ease of learning/learnability• Efficiency of use• Supports cognitive task• Memorability• Error frequency & severity• Aesthetics• Subjective satisfaction

Factors affecting the user’s experience:

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

Usability Principles

Visibility of system status

Match between system & read

world

User control & freedom

Consistency & standards

Help user recognize,

diagnose and recover from

errors

Minimize memory load (recognition over

recall)

Flexibility & efficiency

Motivation & engagement

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

Sources of Usability Evidence

Basic Observation

Expert review/usability inspection

• Testing situationEnd-user observation

Video capture & review

• Qualification & quantificationFormal coding

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

Good Design

*http://www.flickr.com/photos/cyberslayer/1437957836/sizes/l/in/photostream/

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

CPOE System

*Horsky, J., Kaufman, D.R., Oppenheim, M.I. & Patel, V.L. (2003). A framework for analyzing the cognitive complexity of computer-assisted clinical ordering. Journal of Biomedical Informatics, 36, 4-22Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-

factors-1.379697

MedlinePlus Senior’s Health

*Kaufman, D.R. & Starren, J. B. (2006). A methodological framework for evaluating mobile health devices. In the Proceedings of the American Medical Informatics Annual Fall Symposium. Philadelphia: Hanley & Belfus. 978

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

Problematic Interfaces

*http://upload.wikimedia.org/wikipedia/commons/6/66/Butterfly_large.jpg

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

Modified PCA Interface

*Lin, L., Isla, R., Doniz, K., Harkness, H., Vicente, K. J., & Doyle, D. J. (2002). Applying human factors to the design of medical equipment: patient-controlled analgesia. Journal of Clinical Monitoring & Computing, 14(4), 253-263.

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

Glucose Meters

*Kaufman, D.R. & Starren, J. B. (2006). A methodological framework for evaluating mobile health devices. In the Proceedings of the American Medical Informatics Annual Fall Symposium. Philadelphia: Hanley & Belfus. 978

Adapted from: http://knowledge.amia.org/onc-ntdc/usability-and-human-factors-1.379697

NAVIGATION DESIGN• Basic Principles• Prevent mistakes• Simplify recovery from mistakes• Use consistent grammar order

• Types of Navigation Controls• Languages• Menus• Direct Manipulation

• Messages

Types of Menus

Types of Messages

INPUT DESIGN• Basic Principles• Use online and batch processing appropriately• Capture data at the source• Minimize keystrokes

• Input Types• Input Validation

Types of Inputs

Input Validation

OUTPUT DESIGN• Basic Principles• Understand report usage• Manage information load• Minimize bias

• Media• Types of Outputs

Types of Outputs

SUMMARY• User interface design principles• The user interface design process• Navigation design• Input design• Output design