Mens en Informatietechnologie User Interface Design Cognitive Ergonomics

Mens en Informatietechnologie: User Interface Design - Cognitive Ergonomics Gerrit C. van der Veer, gerrit@acm. org / afspraken via elly@cs. vu. nl +31 -20 -5987764/5987718

Is there a problem?

A one day course on theory, methods, and techniques 1. intro to cognitive ergonomics - & schools in C. E. 2. how to handle complexity: models for cognitive ergonomics 3. formal models for design 4. interaction design: techniques and tools

The next phase: User Interface Design: • task analysis / detail design / evaluation techniques • based on current course and design method proposed “Realistic” design case, including “client” • choose techniques based on knowledge of theory and on situation, present arguments for choice and execution • apply in team work • present design report to client

1. Introduction to Cognitive Ergonomics / human-computer interaction • • • ergonomics & cognitive ergonomics a first exercise in user centered design illustration: design for a travel agency (video) schools in cognitive ergonomics literature

Ergonomics – Adaptation? ? Once upon a time in the West …. . The story of the first Ergonomist (California, 1872) – the “gold rush” – need for “transport for the poor”

The idealist Ergonomist “adapt to the user”

The business man “find a cheap solution and let people adapt”

ergonomics & cognitive ergonomics The ergonomics problem: • adjust technology to human user • or the other way round? The cognitive ergonomics problem: • complex systems with different users in different roles and distributed technology in several contexts of use • relevant functionality not visible (all at once) • the role of knowledge and mental models • cognitive ergonomics / social ergonomics

a first exercise in user centered design a configuration for “cursor” keys ( )

Possible solution

Reasons for solutions • • Functionality - relation to task representation - ease of use learning - investing learning time physiology - speed of movements (and perception etc. )

illustration: design for a travel agency (video “Usability Evaluation”, RACE project 1065 - ISSUE) Designing interactive systems for users: • • • important starting point: understanding user and task so: go to the user, and observe the task specify the user’s new task world develop early ideas, represent for the user evaluate early with the user finish specifications

schools in cognitive ergonomics British school (Green, Bernard, Johnson, Long) • cognitive psychology, model based North American school (Norman, Carroll, Moran, Newell) • success stories (Star - theory is in the artifact), task models German speaking school (Oberquelle, Tauber, Pfaff) • partner models, architecture of user interface French school (Bisseret, Scapin & Sebillotte, Hoc) • process models, process control, task analysis Japanese School (Ishii) • Technology driven? Cooperation technology

literature Http: //www. cs. vu. nl/~gerrit/gta/uid Dix, Finlay, Abowd , Beale: Human-computer interaction Preece: Human-computer interaction Shneiderman: Designing the user interface Wilson, Corlett: Evaluation of human work