Thumb performance of elderly users on smartphone touchscreen

Jinghong Xiong, Satoshi Muraki

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)


    This study investigated the relationship between thumb muscle activity and thumb operating tasks on a smartphone touchscreen in elderly users (right hand posture). Three thumb muscles were targeted in the experiment, namely, abductor pollicis brevis, abductor pollicis longus (APL) and first dorsal interosseous (FDI). The results showed that the elderly participants developed fatigue rapidly and tapped more slowly when operating on smaller buttons (diameter 3.0 mm compared with 9.0 mm) and moving in the flexion–extension (compared with adduction–abduction) orientation. Meanwhile, electromyography and perceived exertion evaluation revealed significant increases in FDI in the small button task, and results for APL were significantly greater in the flexion–extension task. This study suggests that the use of small touch-buttons and flexion–extension movement should be minimised in the handheld touchscreen interface design for elderly users.

    Original languageEnglish
    Article number1218
    Issue number1
    Publication statusPublished - Dec 1 2016

    All Science Journal Classification (ASJC) codes

    • General


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