human computer interaction csc 4730 user system interface csc 8570

Human Computer InteractionCSC 4730

User System InterfaceCSC 8570

Class Meeting 10November 13, 2012

Research Project

• The IRB says, “ Go ye, and gather data.”– The official letters will come shortly– The chair of the committee apologizes for the

delay: the envelop was lost in the mail• Progress Report 2, due next week• Draft of first part due in two weeks

Design Team

Here’s 15 minutes for the design teams to meet and check their presentations.

Order of presentation:1. Team R (for Redlands)2. Team Q (for Quincy)3. Team P (for Petaluma)4. Team S (for Sacramento)

Mobile Wallet Worth Having

• Design team presentations• Feedback after each team’s talk• Summary of system design• Final reports due tomorrow, Wednesday,

November 14 by 6:15 p.m.

Article Presentations

The User Experience: next week• Presenter’s responsibilities– 13-16 minute summary of article (or some of its

important points if the article is long)– Connect the article to previous articles, to models

and frameworks, and to examples familiar to you.– Be prepared to answer questions and lead

discussion (5-7) minutes– Time limits will be strictly enforced

Article Presentations (2)

• Presentation style– Use PowerPoint (or Keynote) slides as an outline,

meaning do not read your slides to the audience.– Link to web resources if appropriate– Include diagrams, tables, or images if they will be

helpful. E.g. a small concept map may be useful.

Article Presentations (3)

• Class responsibilities (for those not presenting on the same evening)– Read introduction and conclusion of each article. – For two articles, read in depth and prepare two

intelligent probing questions related to each article.

– Post the questions to piazza.com by 1:00 p.m. of class day.

Article Presentations (4)

• Instructor will:– Use the submitted questions to encourage

discussion.– Judge the submitted questions according to their

intellectual content. For example, “What was the author’s first name?” has little intellectual content.

– Judge the presentation for content summary and synthesis of ideas.

Web Form Design

A user interface nightmare

Overarching questions• What is the user community?• How tolerant, or sophisticated, are the users?– How will community members view their user

experience (UX)?

Web Form Design (2)

Technical questions• What should the Tab key do?• What should the Enter button do?• Should some fields be partitioned into

subfields, e.g. City and State in two different text boxes?

• How should variations of data from outside the US be handled?

Web Form Design (3)

• Should the form use automatic advancing for fixed length subfield entry?– For example, 610-519-6000– Pluses: fewer keystrokes,– Minuses: error correction, user’s mental model

Web Form Design (4)

Field types• Name• Address• Fixed length numeric– Telephone number– Credit card number– ZIP + 4

• Date

Address Entry

• Addresses in free format vs. multi text box entry• Autocomplete (or autofill) of city names• City and state names defined by zip code• Cities without states, e.g. London• Easy selection of state or country names• Confirm parsing of free format• Or use persistent identity

Date Entry

• Subfield text boxes• Single field text box– With separator– Without separator

• Date format• Specialized dates: e.g. expiration date

Name Entry

• Title• Generation• Single name: Is it the first or the last name• Initials• Name length• Culturally driven format• Names using characters from other alphabets

Web Form Entry

• Users say:• GUEPs say:• Design principles say:– Choose the lesser of two evils– Use a clear, short, neatly arranged statement of purpose at

top of form– Tidy and organized design outweighs field ordering– Use imperative language only for required items

Web Form Entry (2)• Use a small number of input methods– Five HTML form elements: drop-down list, radio button,

check box, dialog box, hyperlink. – Scripted or programmed elements

• Keep option list short and sensibly ordered• Offer common choices first. Cater to 80% of users

but allow the other 20% to have success.• For long lists use plain text entry and offer choices– Example

Web Form Entry (3)

• Choose input element– Typing vs. selecting– Potential typing errors– Review of options before selecting– Number of options– Mutually exclusive selections– Distinctiveness of options

• Mark required fields, but consider whether the field information is really required.

Web Form Entry Errors

How should these be handled?• Typing errors• Transcription errors (4311 for 3411)• Category errors– Insisting on an entry– Out of range

• Send errors (premature form submittal)• Privacy errors (user does not want to supply

information)

Error Response

• Show error message close to problem– Use constructive, non-judgmental language

• Keep supplied information

Examples

• Remodeling the house• Going fishing

Specific Design Principles

• Ask only for necessary information• Use proper wording – What is an Email ID?

• Eliminate nerdy or unnecessary comments– Example: Passwords are protected by the SHA 256

hash algorithm.• Prevent errors before they happen by giving

examples of entries.

Next Time

• First four presentations (the user experience interfaces) as listed on the course web page.

• Presenters: Prepare the presentation• Listeners: Prepare two probing questions for

each of two papers. Post the questions on piazza.com by 1:00 p.m. Tuesday, November 19. Use hashtags to connect your questions to the appropriate paper. The tag should be the lead author’s last name, e.g. #wilson.