Cell Phone Operations We Will Compare

3/18/2015, CS3500
KLM-GOMS Great Cell Phone Comparison

Here are the tasks we selected, in class, to compare.  Every student cell phone will have a KLM-GOMS analysis done on each task, then we will combine the results into a grand, cross-class cell phone comparison.

Start all tasks from home screen, unlocked.

  1. Adding someone to address book. John Doe, 555-555-5555
  2. Make a phone call to John Doe, who is in address book. (Go through address book, not in "favorites" or in icon on screen or anything.)
  3. Send text message to John Doe. "You will never be in my favorites list :("
  4. Use web browser to visit main page of Wikipedia.org
  5. Adjust screen brightness to maximum setting.
  6. (From regular, noisy-ring setting) Change to silence/no vibrate setting.
  7. Assign John Doe a (free) ringtone. Last one on list of defaults that came with phone.
  8. Take a black and white picture of projector device in ceiling of classroom. (Set the B&W before take picture, if possible.)
  9. Set an alarm for "today at 3:15 pm"
  10. Check the weather for this Friday for Reno, Nevada
  11. Delete John Doe from address book
  12. One student-selected task -- something you do, or that your phone can do, that is not on the list

If your phone cannot accomplish all these tasks, you will need to select more tasks to analyze (get my approval).

Grading Rubric for this essay

Essay Grading Rubric (20 points total):
UnacceptablePoorFairGood
01 pt2 pts3 pts
Grammar/spellingNumerous grammar/spelling errors (1+ per paragraph); sentences that don't make sense.Many grammar/spelling errors; no completely incomprehensible sentencesSome grammar/spelling errorsFew/no grammar/spelling errors
01-3 pts4-5 pts6-7 pts
Key Concepts Usage No keywords or concepts from the current week of class used in analysis, or discussion reveals fundamentally flawed understanding, or essay is off topic. No comparison of own cell phone with other phones in class based on KLM-GOMS results in analysis, or no discussion of own phone's KLM-GOMS results, or discussion reveals fundamentally flawed understanding Some comparison of own cell phone with other phones in class, based on KLM-GOMS results in analysis, or some discussion of own phone's KLM-GOMS results. Discussion reveals student correctly understands most of the concepts. Compares own cell phone with other phones in class, based on KLM-GOMS results in analysis, and discusses own phone's KLM-GOMS results. Discussion reveals student correctly understands most of the concepts.
01-4 pts5-7 pts8-10 pts
Writing / Analysis QualityEssay is off topic.Disorganized or incoherent prose. Unclear whether or why student likes/dislikes tool. One or more paragraphs are off-topic.Moderately well organized, prose mostly coherent. Clear whether student likes/dislikes tool, though may not be clear why. Topic sentences may not be present for each paragraph.Well organized, coherent prose. Clear whether and why students likes/dislikes tool.

Penalty for not suggesting change to own phone that would improve KLM-GOMS results on own phone.
In addition, the usual penalties apply -- for not identifying the topic of the essay and for bizarre formatting.

KLM-GOMS operators for cell phones

Swipe
Short swipe (about half the width of the screen) with no specific target
Tap
Tap, or pointing at a specific icon, starting from location of home button
Zoom
Zoom, of about half-screen size (in or out)
MaAS
Big attention shift, from phone to real world or back
MiAS
Small attention shift, from screen to keypad, or keypad to hot keys
K
Press a key or button
G
Gesture: shake, rotate, swipe
M
Mental preparation (same as standard KLM)
R
System response (same as standard KLM)
(KLM-GOMS operators for cell phones courtesy of papers in the CHI 2007 and Mobile HCI 2014 conferences.)

Note that you may wish to analyze some of these tasks twice -- one for "how an amateur would do it" and once for "how an expert would do it". In that case, make two rows in the spreadsheet and label them "Amateur: Task X" and "Expert: Task X".

If you choose to analyze both an "Amateur" and an "Expert" way to accomplish some task, put the word "Amateur:" or "Expert:" at the beginning of the task description, not the end. For example: "Amateur: Call Mom, who is in address book." MS Excel frequently hides the end of long labels; "Amateur" at the end of a label will not be easily visible.

Recall, KLM-GOMS does not model user error, or task learnability. We want to analyze both the "Amateur way" and the "Expert way" to accomplish tasks (if two ways exist) to look at how rapidly the beginning phone owner can accomplish tasks in the days, weeks, or months when the owner knows and uses "the slow way," before the owner discovers "the fast way."