HUMAN COMPUTER INTERACTION


HCI 101: Week 2: Session 1 

Conceptualising interaction


Dr. Sameer Sahasrabudhe

What is interaction?


Imagine these scenarios

  • Calling from a local phone booth
  • Calling from a cellphone


What is the difference in the experience?

  Recap  

Observations


Public phone

  • Public phones are designed to be used by the general public
  • Insert money and key in the phone number
  • If engaged or unable to connect the money is returned when the receiver is replaced
  • Money gets inside the box if phone gets connected
  • Insert more money to extend the call
  • Many have Braille embossed on the keys

    Observations


    Cellphone (touchscreen)

    • Intended for all user groups
    • Complex functionality, steep learning curve
    • Save frequently dialed numbers, and press the hot-key to call any of those
    • May be an inconvenience to others!
    • No support for the visually impaired

    Process of interaction design


    1. Identifying needs and establishing requirements
    2. Developing alternative designs that meet those requirements.
    3. Building interactive versions of the designs so that they can be communicated and assessed.
    4. Evaluating what is being built throughout the process

    Understanding problem space



    Asking the users if the product will address their problems

    Getting feedback

    Knowing the details of the problems they have

    Understanding the problem



    Example: Problems carpenters face with a measuring tape

    Understanding the problem


    Example: Problems with a measuring tape

      Version 1                     Version 2

    Think - Pair - Share

    Understanding the problem


    Example: Problems with a measuring tape
    Version 1                 Version 2                 Version 3

    Think - Pair - Share

    What interaction is added?



    Tape with marking facility!

    What interaction is added?



    Digital tape

    What interaction is added?



    Digital measuring tape with laser beam and a display


    More advanced?




    Still, if you can see the convenience here, there are still 30 days left in the Bagel’s campaign.

    How has our navigation evolved?


    Refer Maps
    Ask people
    Remember landmarks
    Make Calls
    Sign boards
    ----------------------------------------------------
    Kiosks
    Mobile apps

    You are here.
    But where is this place?


    How has our navigation evolved?




    What has changed in this interaction?

    Conceptual models



    Description of the system in terms of
    • set of integrated ideas
    • what should it do, behave, and look like


    This description should be understandable by the users
    in an intended manner

    Conceptual models




    Two main types:
    • based on activities
    • based on objects

    CONCEPTUAL MODELS
    based on Activities 




    1. Instructing
    2. Conversing
    3. Manipulating and navigating
    4. Exploring and browsing

    CONCEPTUAL MODEL: Instructing

    Accessing the information/getting the result 
    by instructing the system
    Examples
     Issue instruction to the system to perform a task (Print a page)
    Reminder for appointments (Wake me up at 6:30 AM)

    Preferable for repetitive tasks

    CONCEPTUAL MODEL: Conversing

    Converse with the system to get information/result 



    Examples
    Train time inquiry system
    Search engines



    Preferable when user needs specific kind of information

    CONCEPTUAL MODEL:
    Manipulating and Navigating

    Navigate within the system using the knowledge of the user about the objects in physical world


    Examples
    Computer Desktop screen
    Solitare card game

    Physical action of button pressing instead of giving
    command/asking a query (complex syntax)

    CONCEPTUAL MODEL:
    Browsing and Exploring

    Search, browse, and find different kind of information


    Examples
    Train time inquiry system
    Search engines


    Preferable when user needs specific kind of information

    CONCEPTUAL MODELS
    based on Objects

    Focus is on the way a particular object is used 
    in a specific context

    Example: Ledger for recording data

    CONCEPTUAL MODELS 
    based on Objects

    Focus is on the way a particular object is used 
    in a specific context

    Example: Ledger for recording data

    CONCEPTUAL MODELS 
    based on Objects

    Focus is on the way a particular object is used 
    in a specific context
    Example: Ledger for recording data: SPREADSHEETs

    Activity

    What could be the options for a visitor
    on Somaiya Campus to navigate without problems?


    Mobile App
    Kiosk

    Activity

    What could be the options for a visitor 
    on Somaiya Campus to navigate without problems?


    Mobile App: 2nd Years
    Kiosk: 3rd years

    Activity

    What could be the options for a visitor 
    on Somaiya Campus to navigate without problems?

    Stage 1

    Create User profile

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