Document Detail

Fundamental study on the size and inter-key spacing of numeric keys for touch screen.
MedLine Citation:
PMID:  9735596     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to reveal the optimum size and inter-key spacing of numeric square keys for touch screens. Six male students (22-25 years old) and three female students (21-24 years old) volunteered as subjects for this experiment. Each subject took part in data entry tasks using numeric square keys of touch devices. The sizes of keys were 6, 12, 21, 30 and 39 mm and each the inter-key spacing was 0, 3, 6, 12 and 21 mm. Response times with key sizes of 6 and 12 mm were significantly slower than with key sizes of 21 and 30 mm (p < 0.001). Furthermore, the key size of 6 mm significantly caused more errors than the key sizes of 12, 21, 30 and 39 mm (p < 0.05). The response time with inter-key spacing of 3 mm was significantly faster than with that of 0, 6, 12 and 21 mm (p < 0.001). Inter-key spacing of 0 mm significantly produced more errors than other inter-key spacing. Subjective ratings for inter-key spacing of 3, 6 and 12 mm were significantly better than those of 0 and 21 mm (p < 0.05). These results suggested that the optimum size of numeric square keys for touch screens should be more than 21 mm and optimum inter-key spacing should be from 3 to 6 mm. Optimum key size, however, must be selected with regard to the limitation of screen size.
H Harada; T Katsuura; Y Kikuchi
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of human ergology     Volume:  25     ISSN:  0300-8134     ISO Abbreviation:  J Hum Ergol (Tokyo)     Publication Date:  1996 Dec 
Date Detail:
Created Date:  1998-10-15     Completed Date:  1998-10-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0364267     Medline TA:  J Hum Ergol (Tokyo)     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  167-74     Citation Subset:  IM; S    
Department of Ergonomics, Faculty of Engineering, Chiba University, Japan.
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MeSH Terms
Analysis of Variance
Computer Terminals*
Equipment Design
Human Engineering*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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