IEEM 552 - Human-Computer Systems
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IEEM 552 - Human-Computer Systems. Dr. Vincent Duffy - IEEM Week 13 - Working in Groups May 4, 1999 http://www-ieem.ust.hk/dfaculty/duffy/552 email: [email protected] tonight. recall Visual C++ demo presentations 5 - 10 minutes video Electronic meeting room at GM QOTD

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IEEM 552 - Human-Computer Systems

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Ieem 552 human computer systems

IEEM 552 - Human-Computer Systems

Dr. Vincent Duffy - IEEM

Week 13 - Working in Groups

May 4, 1999

http://www-ieem.ust.hk/dfaculty/duffy/552

email: [email protected]


Tonight

tonight

  • recall Visual C++ demo

    • presentations 5 - 10 minutes

  • video

    • Electronic meeting room at GM

  • QOTD

    • questions related to ‘Working in Groups’

  • after break

    • arrange subject testing schedule

      • let me know if there is a problem with your scheduled time


Ieem 552 human computer systems

Last papers for reading/presentation

  • No papers presented in week 13

  • Week 14 - delayed presentation by 1 week

    • Read paper by Chi, C.F. and Lin, F.T., 1998

    • ‘A comparison of seven visual fatigue assessment techniques in three data acquisition VDT tasks’, Human Factors, Vol. 40, no.4, 577-590.

35


Ieem 552 human computer systems

In the coming weeks

  • wk13 4 may - present Visual C++ modifications

    • read ‘usability testing’ & ‘working in groups’ on reserves,

    • lecture on ‘working in groups’ & video

    • schedule participation as subject (#2), W5,F7,S8,M10, T11

  • wk14 11 may - Review

    • read final paper, project rept. due

    • discuss take home exam question 10 points

      • related to your participation as subject (#2) & ‘software evaluation’

      • you will get to try some analyses related to that data

  • xxx no meeting wk 15,18 may - no presentations

  • wk16 25 may -final exam - rm2302 6:45-9:30

36


Ieem 552 human computer systems

small software development project and ‘thinking aloud evaluation

  • As a group member you will participate in

    • software development

    • ‘thinking aloud’ evaluation, analysis

    • using minimum of 2 subjects (15 minutes)

    • software modification/improvement

    • presentation of before/after interface

      • 4-5 minutes …during week 13.

    • report …due during week 14

      • 1 -2 page summary, 1 page figures screen captures

31


Ieem 552 human computer systems

report format

  • 1-2 page written

    • describe in bullet format

      • process, what helped?

      • what did you need to be careful of?

      • what were the main improvements made

      • who were the subjects in your study

    • presentation

      • during class in week l3, Apr. 5

    • report

      • during class in week 14, May. 12

      • please include your slides from the presentation in an appendix


Ieem 552 human computer systems

  • based on video and discussion tonight

    • see HBS case study - not required reading

      • (11 pages)

    • ‘The Center for Machine Intelligence: Computer Support for Cooperative Work’ (on images reserve)

    • p.499-513 from the book by Alan Dix called ‘Human-Computer Interaction’ (on images reserve)

    • QOTR need not be submitted


Group work in electronic forum

Group work - in electronic forum

  • group dynamics- roles and relationships within a group may change dramatically within the time of the task

  • physical layout - advantage of where to sit, etc. is leveled, particularly when the screen can be controlled from any terminal

  • experimental studies - can be of two types

    • discover how to gain acceptance of the technology

    • compare systems to find impact on effectiveness


Experimental studies of groups

Experimental studies of groups

  • more difficult than for individuals

    • differences in groups are more extreme than those of individuals

    • subjects?

      • for individual, 10 experiments means 10 subjects

      • for group, 10 experiments of group size 3 requires 30

      • additional time needed to get familiar with others

      • more disruption, coordination, and expense

      • many reports of group work include only 3 or 4 groups

      • task - choosing a suitable task is difficult as well


Ieem 552 human computer systems

  • analysis - if you test multiple conditions, your number of groups and subjects increases dramatically to have any chance of getting statistical significance

  • for example

    • if you want to measure the difference between two sets of groups in ‘microsoft net meeting’

      • with 3 individuals in a group

      • to see performance in ‘chat only’ and ‘audio’ conditions

      • minimium of 5 teams in each condition

    • you would need 30 subjects (as noted earlier).

      • if you add any other conditions, you would add many subjects to the experiment


Organizational issues of group work

Organizational issues of group work

  • critical mass

    • need a certain number of users to gain the benefits of the system

    • for example think of the telephone. if your friends don’t have one, the benefit is limited.

  • conflicting goals

    • (CSCW) cooperative work?

    • people in organizations have conflicting goals

    • the electronic system must consider these realities


Video

video

  • Center for Machine Intelligence - General Motors


While viewing consider for discussion

while viewing: Consider for discussion

  • 1. What are the benefits of the system in this work environment?

  • 2. What problems were encountered? (what are the limitations?)

  • 3. How is this system used?

  • 4. Who are the stakeholders that are affected by the system?

  • 5. How did they judge if the system was effective?


Ieem 552 human computer systems

  • 1. What are the benefits of the system in this work environment?

    • sometimes encourage and sometimes discourage consensus

    • helped see areas of agreement and uncovered areas of strong disagreement,

    • find the holes in the process

  • 2. What problems were encountered? (what are the limitations?)

    • who should pay?

    • how to determine if benefit/cost justified?

  • 3. How is this system used?

    • determine if vehicle architecture meets objectives

    • include cross-functional views- techn. and h.r.m.


  • Ieem 552 human computer systems

    • 4. Who are the stakeholders that are affected by the system?

      • engineering, manufacturing, financial

      • each has own independent operations but common objective - satisfy customers

  • 5. How did they judge if the system was effective?

    • note the relationships between technology and culture

    • time to complete task improved


  • Ieem 552 human computer systems

    QOTD

    • 1. What would be the benefits of a system of this type in your work environment?

    • 2. What problems would be encountered? (what are the limitations?

    • 3. How would this system be used, or how should this system be modified if it were to be used in your workplace?

    • 4. Who are the stakeholders that would be affected?

    • 5. How would you know if the system were effective?


    Ieem 552 human computer systems

    • 1. What would be the benefits of a system of this type in your work environment?

    • 2. What problems would be encountered? (what are the limitations?

    • 3. How would this system be used, or how should this system be modified if it were to be used in your workplace?


    Ieem 552 human computer systems

    • 4. Who are the stakeholders that would be affected?

    • 5. How would you know if the system were effective?


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