Effect of touch coordinate display as a form of augmented, concurrent visual   feedback on the accuracy of single-handed typing via smartphone virtual   keyboards

Abdullah Ruhi SOYLU; Görkem YAVAŞ; Bora ERGİN; Sumru KEÇELİ

Article Details

Effect of touch coordinate display as a form of augmented, concurrent visual feedback on the accuracy of single-handed typing via smartphone virtual keyboards

Authors:

Abdullah Ruhi SOYLU | Görkem YAVAŞ | Bora ERGİN | Sumru KEÇELİ

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2017 Vol.25 Issue 3, pp.1724-1732

Document Type:

Article

Publication Date:

5/2017

Document Language:

Turkish

Document ID (Org No.):

2000736338

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632

Abstract:

 

This study assessed the effect of an easily perceived   real-time visual feedback method on touchscreen typing accuracy. Thirty   subjects were asked to hold a smartphone with a capacitive touchscreen in   one hand and enter a text using the thumb of the same hand via a custom   designed virtual keyboard. There were two types of text entry sessions: with   or without visual feedback. The visual feedback consisted of a full-screen   crosshair, representing the accurate coordinate of touch in real time. In   each session, touch-down time on the virtual keyboard and touch coordinates   were recorded for every touch action. Two types of typing errors were   defined: 1) centering error (CE), which was calculated as the mm distance   between the coordinate of the touch and the center of the key, and 2)   incorrect entry (IE), which was the number of missed keys. Student t-tests   and Wilcoxon tests were used for mean and mean-rank comparisons of CE and   IE, respectively. The results showed that visual feedback decreased CE (mean   ±±\pm  SD) significantly from 1.34 ±±\pm  0.38 mm to 0.85 ±±\pm  0.24 mm (P   < 0.0005), and decreased IE (median and range, # of incorrect entries)   significantly from 5.50 and 32.00 to 1.00 and 7.00 (P < 0.005). In   conclusion, the accurate, easily perceived, and 2D real-time feedback   decreases touch-typing error rates markedly and therefore can be of   practical importance for increasing the productivity of smartphone users.

Article Details

Effect of touch coordinate display as a form of augmented, concurrent visual feedback on the accuracy of single-handed typing via smartphone virtual keyboards

Authors: Abdullah Ruhi SOYLU | Görkem YAVAŞ | Bora ERGİN | Sumru KEÇELİ

Publisher: TUBITAK

Journal: Turkish Journal of Electrical Engineering and Computer Science 2017 Vol.25 Issue 3, pp.1724-1732

Document Type: Article

Publication Date: 5/2017

Document Language: Turkish

Document ID (Org No.): 2000736338

Frequency: Bimonthly

eISSN: 1303-6203

pISSN: 1300-0632

Issues

Authors:

Abdullah Ruhi SOYLU | Görkem YAVAŞ | Bora ERGİN | Sumru KEÇELİ

Publisher:

TUBITAK

Journal:

Turkish Journal of Electrical Engineering and Computer Science 2017 Vol.25 Issue 3, pp.1724-1732

Document Type:

Article

Publication Date:

5/2017

Document Language:

Turkish

Document ID (Org No.):

2000736338

Frequency:

Bimonthly

eISSN:

1303-6203

pISSN:

1300-0632