The effect of hand anthropometry on Short Message Service (SMS)
satisfaction was investigated using structured questionnaire interviews
with 110 subjects, aged between 17-25 years old. Hand size was measured
to assess its effect on mobile phone design factors satisfaction whereas
thumb circumference and length were measured for keypad design factors.
Small hand-sized subjects were found to be more satisfied with mobile
phone dimensions than large hand-sized subjects. Thumb circumference significantly
affects users` satisfaction towards key size and space between keys whereas
thumb length significantly affects keypad layout satisfaction. Both thumb
circumference and length significantly correlate negatively with the corresponding
keypad design factors. Results confirm that hand anthropometry do affect
users messaging satisfaction. These findings should prove useful to mobile
phone designers who could look into the possibility of designing customized
mobile phones that cater to large hand and thumb sized users, so as to
increase their subjective satisfaction.