Big Point

Questions

2. show eye-tracking demo

3. Interface tour: Ron Brown

4. Discuss user studies (due today)

5. Speech

Yankelovich et al.

Example of user testing with iterative improvements between subjects

Mail, calendar, question answering (weather, stocks) tasks with a prototype customized system closely coupled to the tasks

Different interaction style than GUI..toward interpersonal conversation

Error handling a crucial research problem

Types of system errors: recognition (rejection, substitution, insertion) and design solutions

Need for verification in the interaction cycle, new surrogates?

Karat et al

Example of controlled comparison user study (with extensions)—note design

Text composition and transcription tasks with three commercial systems

Keyboard-mouse much faster, due to error correction; also higher satisfaction, no comp quality differences

Keyboard-mouse errors are user errors, speech errors are system errors

Error correction strategies needed (word misrecognition, phrase misrecognition, command misrecognitions, dictation as command misrecognitions)

Theme for discussion: Error detection and correction are important elements of interaction. Errors shape/change user mental models and expectations, in turn shaping behavior. Factor into theory of interactivity; Consider implications for design

5.5. Assignment: Conduct some searches on various engines….examine results with the idea of improving google’s results display

6. Readings for next meeting:
Tilebars: Read Hearst (ACM DL)

7. One-minute paper

What was the big point you learned in class today?

What is the main, unanswered question you leave class with today?