Effect of target size on non-visual text-entry

André Rodrigues; Hugo Nicolau; Kyle Montague; Luís Carriço; Tiago Guerreiro

doi:10.1145/2935334.2935376

Effect of target size on non-visual text-entry

André Rodrigues, Hugo Nicolau, Kyle Montague, Luís Carriço, Tiago Guerreiro

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

8 Citations (Scopus)

Abstract

Touch-enabled devices have a growing variety of screen sizes; however, there is little knowledge on the effect of key size on non-visual text-entry performance. We conducted a user study with 12 blind participants to investigate how nonvisual input performance varies with four QWERTY keyboard sizes (ranging from 15mm to 2.5mm). This paper presents an analysis of typing performance and touch behaviors discussing its implications for future research. Our findings show that there is an upper limit to the benefits of larger target sizes between 10mm and 15mm. Input speed decreases from 4.5 to 2.4 words per minute (WPM) for targets sizes below 10mm. The smallest size was deemed unusable by participants even though performance was in par with previous work.

Original language	English
Title of host publication	Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016
Publisher	ACM
Pages	47-52
Number of pages	6
ISBN (Electronic)	9781450344081
DOIs	https://doi.org/10.1145/2935334.2935376
Publication status	Published - 6 Sept 2016
Externally published	Yes
Event	18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016 - Florence, Italy Duration: 6 Sept 2016 → 9 Sept 2016

Publication series

Name	Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016

Conference

Conference	18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016
Country/Territory	Italy
City	Florence
Period	6/09/16 → 9/09/16

Keywords

Blind
Key size
Performance
Text-entry
Touchscreen

Access to Document

10.1145/2935334.2935376

Honourable Mention
Montague, K. (Recipient), 2016
Prize: Honorary award

Cite this

Rodrigues, A., Nicolau, H., Montague, K., Carriço, L., & Guerreiro, T. (2016). Effect of target size on non-visual text-entry. In Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016 (pp. 47-52). (Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016). ACM. https://doi.org/10.1145/2935334.2935376

Rodrigues, André ; Nicolau, Hugo ; Montague, Kyle et al. / Effect of target size on non-visual text-entry. Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016. ACM, 2016. pp. 47-52 (Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016).

@inproceedings{dd62f4e85e8d4478a827a9a9f800b397,

title = "Effect of target size on non-visual text-entry",

abstract = "Touch-enabled devices have a growing variety of screen sizes; however, there is little knowledge on the effect of key size on non-visual text-entry performance. We conducted a user study with 12 blind participants to investigate how nonvisual input performance varies with four QWERTY keyboard sizes (ranging from 15mm to 2.5mm). This paper presents an analysis of typing performance and touch behaviors discussing its implications for future research. Our findings show that there is an upper limit to the benefits of larger target sizes between 10mm and 15mm. Input speed decreases from 4.5 to 2.4 words per minute (WPM) for targets sizes below 10mm. The smallest size was deemed unusable by participants even though performance was in par with previous work.",

keywords = "Blind, Key size, Performance, Text-entry, Touchscreen",

author = "Andr{\'e} Rodrigues and Hugo Nicolau and Kyle Montague and Lu{\'i}s Carri{\c c}o and Tiago Guerreiro",

year = "2016",

month = sep,

day = "6",

doi = "10.1145/2935334.2935376",

language = "English",

series = "Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016",

publisher = "ACM",

pages = "47--52",

booktitle = "Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016",

address = "United States",

note = "18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016 ; Conference date: 06-09-2016 Through 09-09-2016",

}

Rodrigues, A, Nicolau, H, Montague, K, Carriço, L & Guerreiro, T 2016, Effect of target size on non-visual text-entry. in Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016. Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016, ACM, pp. 47-52, 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016, Florence, Italy, 6/09/16. https://doi.org/10.1145/2935334.2935376

Effect of target size on non-visual text-entry. / Rodrigues, André; Nicolau, Hugo; Montague, Kyle et al.
Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016. ACM, 2016. p. 47-52 (Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Effect of target size on non-visual text-entry

AU - Rodrigues, André

AU - Nicolau, Hugo

AU - Montague, Kyle

AU - Carriço, Luís

AU - Guerreiro, Tiago

PY - 2016/9/6

Y1 - 2016/9/6

N2 - Touch-enabled devices have a growing variety of screen sizes; however, there is little knowledge on the effect of key size on non-visual text-entry performance. We conducted a user study with 12 blind participants to investigate how nonvisual input performance varies with four QWERTY keyboard sizes (ranging from 15mm to 2.5mm). This paper presents an analysis of typing performance and touch behaviors discussing its implications for future research. Our findings show that there is an upper limit to the benefits of larger target sizes between 10mm and 15mm. Input speed decreases from 4.5 to 2.4 words per minute (WPM) for targets sizes below 10mm. The smallest size was deemed unusable by participants even though performance was in par with previous work.

AB - Touch-enabled devices have a growing variety of screen sizes; however, there is little knowledge on the effect of key size on non-visual text-entry performance. We conducted a user study with 12 blind participants to investigate how nonvisual input performance varies with four QWERTY keyboard sizes (ranging from 15mm to 2.5mm). This paper presents an analysis of typing performance and touch behaviors discussing its implications for future research. Our findings show that there is an upper limit to the benefits of larger target sizes between 10mm and 15mm. Input speed decreases from 4.5 to 2.4 words per minute (WPM) for targets sizes below 10mm. The smallest size was deemed unusable by participants even though performance was in par with previous work.

KW - Blind

KW - Key size

KW - Performance

KW - Text-entry

KW - Touchscreen

U2 - 10.1145/2935334.2935376

DO - 10.1145/2935334.2935376

M3 - Conference contribution

AN - SCOPUS:84991383736

T3 - Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016

SP - 47

EP - 52

BT - Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016

PB - ACM

T2 - 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016

Y2 - 6 September 2016 through 9 September 2016

ER -

Rodrigues A, Nicolau H, Montague K, Carriço L, Guerreiro T. Effect of target size on non-visual text-entry. In Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016. ACM. 2016. p. 47-52. (Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2016). doi: 10.1145/2935334.2935376

Effect of target size on non-visual text-entry

Abstract

Publication series

Conference

Keywords

Access to Document

Fingerprint

Prizes

Honourable Mention

Cite this