ITIS 3130 Human Computer Interaction

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Presentation transcript:

ITIS 3130 Human Computer Interaction Dr. Heather Richter richter@uncc.edu

Agenda Course Info & Syllabus Course Overview Introductions HCI Overview

Course Information Books Web Interaction Design by Preece, Rogers, and Sharp, Wiley 2002. The Design of Everyday Things, by Donald Norman, 2002. Web http://www.sis.uncc.edu/~richter/classes/2006/3130/index.html Overview Grading and Policies Syllabus and Lectures Assignments Swiki

Course Information Grading 10% Participation 10% Assignments More next… 45% Project More details to come… 15% Midterm 20% Final

Assignments Most done individually (a few at the end are not) Post to the Swiki by NOON on the due date Credit given for reasonable effort Not graded, become a part of the project instead Discuss in class on due date, bring print out so you can talk about it

Assignments Lead class discussion 10 minute discussion on the assignment, or on another topic Counts as two assignments

Group project Theme: Encourage or support the use of public transit 3 parts 4-5 people per group, graded as a group Original interface design and evaluation Each part due by class time on the due date Project notebook on Swiki with each write up Theme: Encourage or support the use of public transit

Course Aims Consciousness raising Design critic Learn Design Process Make you aware of HCI issues Design critic Question bad HCI design - of existing or proposed Learn Design Process Software interfaces and beyond Improve your HCI design & evaluation skills Go forth and do good work!

Course Overview Requirements Gathering Design Evaluation How do you know what to build? Human abilities Design How do you build the best UI you can? Evaluation How do you make sure people can use it? Also web and visual design, dialogue paradigms, groupware, ubiquitous computing, assistive technology

How to do well Time and effort Attention to detail Communication Do the reading and assignments Attend class and participate Spend time on the project Attention to detail Communication Tell me what you learned and why you made decisions

Introductions – Dr. Heather Richter Ph.D. in C.S. from Georgia Tech in May 2005 HCI, Ubiquitous Computing, and Software Engineering focus Contact info: Email preferred, put 3130 in title Office: 305E Woodward Office Hours: Monday 1-3pm By appointment

Introductions – Your Turn Name, year, major Previous HCI/interface experience? A product/device/application you Love to use and why Hate to use and why

Now let’s get started What is Human-Computer Interaction?

HCI The interaction and interface between a human and a computer performing a task Tasks might be work, play, learning, communicating, etc. etc. Write a document, calculate monthly budget, learn about places to live in Charlotte, drive home… …not just desktop computers anymore!

Why do we care? Computers (in one way or another) now affect every person in our society Tonight - count how many in your home/apt/room We are surrounded by unusable and ineffective systems! Its not the user’s fault!! Product success may depend on ease of use, not necessarily power You will likely create an interface for someone at some point Even if its just your personal web page

Goals of HCI Allow users to carry out tasks Safely Effectively Efficiently Enjoyably

Usability Combination of: Ease of learning High speed of user task performance Low user error rate Subjective user satisfaction User retention over time

Design Evaluation Both subjective and objective metrics Some things we can measure Time to perform a task Improvement of performance over time Rate of errors by user Retention over time Subjective satisfaction

UI Design / Develop Process User-Centered Design Analyze user’s goals & tasks Create design alternatives Evaluate options Implement prototype Test Refine IMPLEMENT

Know Thy Users! Physical & cognitive abilities (& special needs) Personality & culture Knowledge & skills Motivation Two Fatal Mistakes: Assume all users are alike Assume all users are like the designer

Design is HARD! “It is easy to make things hard. It is hard to make things easy.” – Al Chapanis, 1982 Design is more difficult than you think Real world constraints make this even harder

And a little history… ? User Productivity ? Time WIMP (Windows) Command Line Batch ? 1940s – 1950s 1960s – 1970s 1980s - Present Time

Batch Processing Computer had one task, performed sequentially No “interaction” between operator and computer after starting the run Punch cards, tapes for input Serial operations

Paradigm: Networks & time-sharing (1960’s)  Command line  teletype increased accessibility interactive systems, not jobs text processing, editing email, shared file system Need for HCI in the design of programming languages

Innovator: Douglas Englebart Landmark system/demo: hierarchical hypertext, multimedia, mouse, high-res display, windows, shared files, electronic messaging, groupware, teleconferencing, ... Invented the mouse http://sloan.stanford.edu/MouseSite/1968Demo.html

Paradigm: WIMP / GUI Windows, Icons, Menus, Pointers Graphical User Interface Timesharing=multi-user; now we need multitasking WIMP interface allows you to do several things simultaneously Has become the familiar GUI interface Xerox Alto, Star; early Apples

PCs with GUIs Xerox PARC - mid 1970’s Alto local processor, bitmap display, mouse Precursor to modern GUI, windows, menus, scrollbars LAN - Ethernet

Xerox Star - 1981 First commercial PC designed for “business professionals” desktop metaphor, pointing, WYSIWYG, high degree of consistency and simplicity First system based on usability engineering Paper prototyping and analysis Usability testing and iterative refinement

Xerox Star - 1981 Commercial flop $15k cost closed architecture lacking key functionality (spreadsheet)

Apple Macintosh – 1984 “The computer for the rest of us” Aggressive pricing - $2500 Not trailblazer, smart copier Good interface guidelines 3rd party applications High quality graphics and laser printer

Next Paradigms? What comes after Windows? Ubiquitous Computing? Mobile Computing? 3D Interaction? What will be the next technological innovation?

Paradigm: Mobile Computing Devices used in a variety of contexts Laptop, cell phones, PDAs How do devices communicate? How to get information to each device when needed? How to take advantage of context?

Paradigm: Ubiquitous Computing Person is an occupant of a computationally-rich environment Computers with ourselves, on our walls, in our appliances, etc. How to do the “right” thing for the people in the environment? Can no longer neglect macro-social aspects

Course ReCap To make you notice interfaces, good and bad You’ll never look at doors the same way again To help you realize no one gets an interface right on the first try Yes, even the experts Design is HARD To teach you tools and techniques to help you iteratively improve your designs Because you can eventually get it right

Next time Project details Ethics, working with people Read ID 6.1-6.4