Cell Phone Operations We Will Compare

6/15/2020, 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, phone unlocked. No Siri/Alexa. Predictive texting turned off.

  1. Go to youtube.com, find and start the video "how to touch a wall with an apple" (apple lower-case - the fruit). Use the Youtube app.
  2. Call a user named "Mom" where the user name is already in your address book.
  3. Text 555-5555 and send the message "Hello"
  4. Turn on the flashlight
  5. Set an alarm for M, Tu, Wed, Thu, Fri (every weekday) at 7 am.
  6. Take a picture of a pen/pencil on the table in front of you
  7. Create a new contact, John Appleseed, with contact info apple@seed.com and birthdate 12/25/2000.
  8. Take a note using default note-taking app, "Don't forget Essay 5"
  9. Use Google Map app to pull up a map of CSU Stanislaus
  10. 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):
01-4 pts5-7 pts8-10 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.
01-3 pts4-5 pts6-7 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.
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

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

Zoom in/out about half width of screen
Tapping a particular target spot on a touchscreen
Moving cursor on screen (includes one tap to end movement). Implies a longer finger stretch than tapping.
Moving an object on the screen. Continuous touch.
Short, fast finger slide on screen.
Big (macro) attention shift, from phone to real world or back
Small (micro) attention shift, from screen to keypad, or keypad to hot keys
Press a key or button
Gesture: shake, rotate
Mental preparation (same as standard KLM-GOMS)
R or W(t)
System response (same as standard KLM)
(KLM-GOMS operators for cell phones courtesy of papers in the CHI 2007 and Mobile HCI 2014 conferences, and in the Human Movement Science journal in 2015.)

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."