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An Investigation on Mobile Phone Users’ Performance of Using Chinese Input Systems. Zhenqing WU Hongbo MENG Xiaoda LU Yongkang GUO Yao DING. The objective is to…. - PowerPoint PPT Presentation
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Zhenqing WUHongbo MENG
Xiaoda LUYongkang GUO
Yao DING
To develop a statistically reliable analysis on possible factors that may have influence on the usability of Chinese input on mobile phones.
Usability◦ Average typing speed◦ Error rate◦ User satisfaction
Usability
Input device
UserMeasurement Environment
Text
Input method
Keypad
Difficulty
Background noise
Temperature
Length
Age
Punctuation
Mandarin level
Concentration Lightness
Key size
Surveyor
Key shape Screen size
Layout Hand-writing
Stroke
Pinyin Touch-screen
Button
Input methods◦ Pinyin◦ Stroke
Input devices◦ Touch-screen◦ Button
Keypad layout◦ Numeric keypad◦ Full keypad
Associating input Fonts Screen contrast Screen brightness Environment factors
Differences among subjects◦ Mandarin level◦ Chinese input habit◦ Concentration
Differences among testing materials–- Testing material design guidelines◦ 不是成句的词组形式,否则输入法处理过于简易;◦ 句式不可过于复杂,避免因此而导致的测试者之间的噪音;◦ 句子长度控制在 20字左右为佳;◦ 句子之间的标点应该保持一致,避免因为标点转换而造成的时间差异。
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Combination Input method Keypad layout Input deviceA Pinyin Numeric keypad Touch-screenB Pinyin Numeric keypad ButtonC Pinyin Full keyboard Touch-screenD Pinyin Full keyboard ButtonE Stroke Numeric keypad Touch-screenF Stroke Numeric keypad Button
6*6 Latin square design
Testing material
Subject1 2 3 4 5 6
1 A F E D C B2 B A F E D C3 C B A F E D4 D C B A F E5 E D C B A F6 F E D C B A
Average typing speed◦ Stop watch
Error rate◦ Number of clicking “backspace”
To eliminate the two nuisance sources of variability:◦ The test material used◦ The different subject chosen for the test• Since there are six treatments, six subjects are chosen and they are tested on six different test materials.
Model:yi=µ+αi+βj+τk+ξijk
Data for input time and input speed are collected as follows:
Input time:◦ Significantly different among treatments◦ Insignificant difference among subjects and
materials
Input accuracy◦ Significantly different among subjects ◦ Insignificant difference among treatments and
materials
At first a 23 full factorial design Swapped to separately process pinyin input
data and stroke input data◦ No possible combination of full keyboard and
stroke◦ People stick with one preference among pinyin
input method and stroke input method
22 full factorial design
Deal with different combinations of subjects and materials as replicates of each design (No significant effect is shown in the Latin square analysis)
3210- 1- 2- 3
99
9590
80706050403020
105
1
标准化效应
百分
比
A Key LayoutB Key Type
因子 名称
不显著显著
效应类型
B
A
标准化效应的正态图 Speed Al pha = . 05)(响应为 ,
Effect of factors◦ Numeric keyboard would increase speed◦ Button keys would increase speed
Best Combination:◦ Numeric keyboard + Button keys
Worst Combination:◦ Full keyboard + Touch screen
Two-sample t-test◦ P-Value=0.672>α◦ No significant difference
Consideration of user habits Sample size
500- 50- 100
99
9590
80706050403020
105
1
效应
百分
比
A AB BC C
因子 名称
不显著显著
效应类型
A
效应的正态图(响应为 C10,Al pha = . 20)
Lenth 的 PSE = 30. 375
Subject 1
Pinyin is very helpful
Most users
Need more factors to do future experiment
100500- 50- 100
99
9590
80706050403020
105
1
效应
百分
比
A AB BC C
因子 名称
不显著显著
效应类型
效应的正态图(响应为 C8,Al pha = . 05)
Lenth 的 PSE = 43. 75
Most users
Need more factors to do future experiment
10- 1- 2- 3
99
9590
80706050403020
105
1
效应
百分
比
A AB BC C
因子 名称
不显著显著
效应类型
AC
效应的正态图(响应为 C11,Al pha = . 05)
Lenth 的 PSE = 0. 375
Subject 1
input method and key type(touch or button)
0. 50. 0- 0. 5- 1. 0- 1. 5
99
9590
80706050403020
105
1
效应
百分
比
A AB BC C
因子 名称
不显著显著
效应类型
B
A
效应的正态图(响应为 C12,Al pha = . 05)
Lenth 的 PSE = 0. 125
Most users
whether the input method is Pinyin or Stroke and whether the key layout is full or numberic keyboard are very critical.
For the input speed, each people may have different significant factors, for the most users, it seems like that we have to include other factors to give further conclusion.
For the input accuracy, people may have different significant factors just like their impact on input speed, however, for the most users, we can conclude, that Pinyin and Numeric keypad are very helpfull to reduce the error rate.
Content◦ Basic information of subjects◦ Indices rating from 1 to 7
Shortcomings◦ Limited number of subjects◦ Varied rating tendency◦ Underlying interactions
Pinyin is preferred while stroke possess a high variation
Button and touch-screen posses similar rating, and all vary significantly
Full keyboard
Underlying interactions exist
Thanks!