Redesign the Webcast Interface

1
Redesign the Webcast Interface

• Lin Jiang
• Catherine Lai
• Phoebe Liu

2
Introduction

• Webcast is a system for videotaping class
  lectures
• Useful and widely used by students
• Project goal
• Clean, simple, easy to use interface
• Searching and browsing
• Customization

3
Issues addressed in Heuristic Evaluation

• 1. Visibility of system status
• 2. User control and freedom

4
Demo

• http//www.sims.berkeley.edu/academics/courses/is2
  13/s02/projects/webcast/Third/index.htm

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Pilot Usability Study

• Overall
• Ease-of-use and Enjoyment
• Help Hints
• Use again?
• Interaction Flow
• Auto-Checking Process
• Video Bookmarking Process
• MyWebcast Auto-Remembering Process

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How we Measure

• Subjective Measures
• Participants comments
• Questionnaires and interviews
• Objective Measures
• Time to complete tasks
• Amount of help needed

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Overall Usage
Strongly disagree
Strongly agree
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Help and Hints

• Findings
• People dont use help in general
• Spend more time exploring the system and figuring
  out on their own
• Our Response
• Still keep help
• More logical interaction flow
• More clear terminology

9
Auto-Checking

• Findings
• Placement causes less distractions
• Confusion on Internet Connection Speed
• Our Response
• Eliminate the option of Internet Connection Speed

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Video Bookmarking

• Findings
• Confusion on the term bookmark this video page
• Understand the process after completing the
  interaction
• Our Response
• Change the original term to Add Video to
  MyWebcast
• Change description in how it works

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Auto-Remembering

• Findings
• Easy and useful without log-in
• MyWebcast gives a sense of creating an account
• Wont work for users accessing Webcast from
  different locations
• Our Response
• Keep the term MyWebcast
• Auto-Remembering as default, w/ option for log-in
• More discussion in Formal Experimental Design

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Formal Experiment Design

• Hypotheses
• Auto-Remembering with option to log-in will
  satisfy both users with different access type,
  thus increase the ease-of-use and reducing the
  number of errors.

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Formal Experiment Design

• Independent Variables
• Log-in type(i) Auto-Rembering with cookies(ii)
  Auto-Remembering with cookies and with option to
  log-in(iii) Mandatory log-in
• Type of access(i)using the same computer most
  of the time(ii)always using different computers
  to access

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Formal Experiment Design

• Dependent Variables
• overall ease-of-use
• overall satisfaction
• time to complete tasks
• number of errors

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Formal Experiment Design

• Between Group DesignWe choose between group
  design for the following reasons(i) get the
  most intuitive response from each interface(ii)
  it is unrealistic to eliminate the learning
  effect simply by reordering different interfaces.

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Formal Experiment Design

• Blocking and Repetitions

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Valuable Lessons Learned

• Important to put things in context
• Power of convention
• Users disregard Help and Hints
• UI design is an iterative process
• Be open-minded

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Questions?

• Thank You!