Understanding Grip Shifts: How Form Factors Impact Hand Movements on Mobile Phones
summary
Controlled lab studies use a custom JavaScript/HTML app plus two synchronized cameras and phone sensors (accelerometer alpha beta gamma) to compare four grips across four phone sizes (iPhone 4, 5, 6, 6 Plus) in an 8‑target pointing task. Results show movement magnitude: asymmetric bimanual with finger < symmetric bimanual < asymmetric bimanual with thumb < single-handed, smaller phones (4/5) move less than larger ones, and three prototype controls (adaptive keyboard, adaptive scrolling, adaptive homepage) illustrate practical UI responses to measured tilt and rotation.
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chapters (11)
- 0:00Introduction to grip shifts
- 0:50Grip types demonstration
- 1:57Motivation and hand grip theory
- 3:44Research stages overview
- 4:05Qualitative study on interactions
- 6:12Quantitative study on phone size
- 8:25Key findings from quantitative data
- 10:13Participant ratings and comfort
- 11:42Design implications and concepts
- 12:47Summary and future work
- 13:30Q&A session
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