Usability results ,background results &task timing -- HCI Group Project

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Date Posted: 22:38:22 08/13/02 Tue
Author: Xu Tian
Subject: Usability results ,background results &task timing

User Background Survey

Portland State University
CS560 Human Computer Interaction Project
Thank you for agreeing to participate in the study. Before we begin, it will be useful for us to know more about your background�your experience with MP3 player, with computer, and so on. This will help us to better understand your interactions and reactions to our MP3 player. Remember that all personal data will be treated confidentially and reported with no identifying information.

Name: undisclosed Age: 71

Occupation: retired Years of Education: 16

1.Do you own a computer?
yes
2.Do you surf the internet? How often?
no
3.Have you ever bought or sold anything off the net?
no
4.Have you ever downloaded anything off the internet?
no
5.Have you had any experience with using a cassette player?
yes
6.Do you have a portable CD player or other personal music device?
yes
7.Do you use / like to use headphones?
yes
8.How do you learn to operate a device ?
Read manual
9.Do you own any electronic devices like a (mark as many as applicable)
� TV
� VCR
� DVD
Other (Specify) � camcoder

Questionnaire

For Scenario #1:
You have just tried out a few tasks and features on the new MP3 player prototype being developed by our design team. Could you answer a few questions for us?

Task 1: Turn on the machine.
Rate the task�s difficulty for us:

Easy
. Did you locate the power button immediately?
Yes

2. Did you think that the marking on the power button is easy to read?
Yes

3. Do you notice the LCD flash on when you turned the player on?
Yes

4. Did you notice the LCD screen? Yes
Notes: If yes, Can you describe what was displayed immediately after you turned it on?
some song name, playing time

Task 2: You decide that you want to listen to 107FM. Please do so.
Rate the task�s difficulty for us:
easy
1. Did you locate the mode button immediately? No
Notes:

he pauses for a second and clicks �FM� button, but can find 107FM, because there is no 107FM .

2. Is the mode button clearly marked? Yes

3. Did you find it difficult to switch to FM mode? No
Notes:

4. Did you locate the tuner immediately?
Notes: (if not where did you look for it first - notes)

Yes

5. How did you figure out that the station has been tuned to?
Notes:

Clicked on the �+�.

Task 3: Imagine that some time has passed and now you decide that you want to listen to an MP3 song. Please go ahead and listen to the song titled Good Times.
Rate the task�s difficulty for us:

Easy

1. Did you have to switch to MP3 mode? Yes

2. Did you know the track number of song Good Times? Yes

3. Did you locate the scroll buttons fairly easily? Yes

4. Did you notice that the songs were highlighted? Yes
Notes:

5. Were you able to select the song fairly easily? Yes
Notes:

Task 4: Now assume that this song has finished playing. You want to now listen to the first MP3 song. Please go ahead.
Rate the task�s difficulty for us:

Easy

1. Which buttons did you use? Scroll buttons

2. How did you figure that you have reached the first song? Looked at LCD Notes:

Noted that it was listed with the number 1.

3. Which button did you use to play the song? Play button
Notes:

Task 5:
The volume is a little loud, please go ahead and turn it down.
Rate the task�s difficulty for us:

easy

1. Were you able to locate the volume button easily? Yes

2. Did you notice the LCD? Yes

Task 6:
You have to run. Please proceed to tell me how you would bring the device with you so that you could still listen to it.
Notes:

I am too old to run.

Taks 7: Turn the player OFF.
Did you figure out that the Power button can be used to turn off as well ?
Yes
Notes:

The red button is noticeable

For Scenario #2
Background for Tasks 1-9:
Imagine that you are continuing to play with the device at a later time.

Task 1:
Go ahead and turn on the machine and plug in the headphones.
Notes:

The symbol is helpful

Task 2:
You decide that you want to play Fragile. Please proceed to do so.
Notes:

scrolled down the song list and found it

Task 3:
Now the song is not quite loud enough for you to hear it comfortably. Go ahead and turn up the volume. Can you tell, aside from hearing the device, how loud the volume is? How?
Notes:

saw the volume bar was increasing

Task 4:
You are tired of listening to this song and want to skip to the very next track, please go ahead.
Notes:

clicked on the arrow keys on the bottom

Task 5:
Now imagine that you get a phone call. You do not want to lose your place in the song. Can you do anything about that? Do you know where you are in the song?
Rate the task�s difficulty for us:

easy

1. Did you notice that the play/pause buttons are the same?
yes

Task 6:
The song has finished and you want to go to song # 8 because your friend said that when he or she recorded the songs they recorded one of your favorites as track number 8.
Rate the task�s difficulty for us:

Easy

1. How did you locate the track number you were at?
Notes:

Pushed the >> button to select the one he want

2. How did you detect that you have been able to select the song?

It was highlighted

Task 7:
Next, let us pretend that you want to listen to the radio. Your favorite station is 100 AM. Please go ahead and turn the radio on and move to that station.
Rate the task�s difficulty for us:

Very Difficult .

Notes:

Task 8:
Can you tell how much battery life the device still has in it?
Rate the task�s difficulty for us:

Easy

Notes:

Task 9:
You have to run. Please go ahead and turn off the machine. Assume that the battery is low. Describe how you would recharge it while you are away. This will complete this scenario. Thank you.
Notes

It took him a while to click on the bottom button to find the hole, but not sure that is for recharge

1. Could you please comment about the appearance of this new MP3 player?

I won�t buy one like this, I like my stereo

2. What did you like about this MP3 player?

I don�t like it

3.What did you dislike?

too small
4. Do you think you would want more features with this player? If yes, which ones?

no

5. Do you think that this new player is easy to carry?

no idea

6. Do you think that this new player is simple to operate?

yes

7. Rate this player compared to any other portable music players that you own on a scale of 1 to 4? 1 being very good and 4 being very bad

2

Task timing:

Scenario # 1
Task 1: 8 sec
Task 2: 10 sec
Task 3: 10 sec
Task 4: 20 sec
Task 5: 23 sec
Task 6: 33 sec
Task 7: 6 sec

Scenario # 2
Task 1: 5 sec
Task 2: 10 sec
Task 3: 8 sec
Task 4: 12 sec
Task 5: 14 sec
Task 6: 22 sec
Task 7: 14 sec
Task 8: 32 sec
Task 9: 12 sec

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