CSC 8570 USI

1
CSC 8570 -- USI

• Class Meeting 3
• September 6, 2006

2
Motor Behavior Models

• Qualifications of author
• Updates in the literature
• 304 hits in Google

3
Group Activity

• Group 1 Section 3.2.1KLM model for adding a
  caller to a contact list
• Group 2 Section 3.2.2Buxtons model of touchpad
• Group 3 Section 3.3.1Fitts Law example data
• Group 4 Section 3.4.1Fitts Law, multitap data
  entry
• Group 5 Section 3.4.1Fitts Law, one-key with
  disambiguation data entry
• Group 6 Section 3.4.2Guiards model for
  scrolling

4
Group Questions

• Apply the model as instructed and assess its
  usefulness for the situation.
• Use the model to estimate the error cost of the
  action or operation.
• Provide computations and explanations that show
  the table entries are correct, the equations
  follow from one another, and the diagrams are
  meaningful.
• Propose three research questions that follow from
  the section. (What do inquiring minds want to
  know?)

5
Group Reports

• The situation and its model
• The data and their interpretation
• The research questions

6
Fitts Law Questions

• How does Fitts Law generalize to 2-dimensional
  targets?
• Where does the user aim?
• Where does the user land?
• What path is followed?
• What happens with partially hidden targets?

7
Physical Design Questions

• What is the optimal size of a widget?
• Will left-hand scrolling work efficiently?
• What does bilingual keyboard mean? How does it
  help?
• How helpful are ergonomic keyboards?
• Can the user cope with overloaded mouse buttons?

8
MacKenzies Work

• Accuracy Measures for Evaluating Computer
  Pointing Devices, CHI 2001, 9-16.
• Comparison of Two Input Methods for Keypads on
  Mobile Devices, NordiCHI 04, 101-104

9
Research Project

• Teams (done)
• Areas (should be narrowed, can be revised)
• Hypothesis
• Independent variables
• Dependent variables

10
Research Project (2)

• Sources
• ACM Digital Library
• Science Citation Index
• Web, but be careful
• Conference proceedings, MSC 159

11
Research Project (3)

• Tools
• Task analysis modeler (Paterno)
• Quick GOMS (David Beard)
• Help system compiler
• Examples
• MacKenzies papers

12
Research Project (4)

• Experimental design
• Between subjects
• Within subjects
• Sources of bias
• Sources of subjects
• Logic of conclusions

13
Next Time

• Read Carroll, Chapter 4.
• Create a GOMS model for the task of deleting a
  file from a folder.
• Create a GOMS model for setting the time on a
  clock or watch one hour earlier (as well have to
  do shortly)
• Submit hypothesis, independent variables,
  dependent variables
• Submit draft of IRB form

14
Research Team Meetings