Ensure the user can easily make interface elements larger (adjustable).
The use of large interface elements or through a mechanism that aims to adjust the size of interface elements according to the user preferences, eases the readability and understanding of the user interface, especially for users with some visual impairments.
This example shows an user increasing the size of the interface elements.
Tabletop Sharing of Digital Photographs for the Elderly,2006
Touch Screens for the Older User,2011
Design Principles to Accommodate Older Adults,2012
Accessibility, Adaptability, Elderly, Large-elements, Layout, Legibility, Learnability, Reading, Understanding, Vision, Target Design.
Tap gestures (when applied to well recognized objects) are the easiest ones to understand and remember.
The tap gesture is considered a simple gesture for performing in the multi-touch interaction. This gesture is easy to understanding and remembering in the future interactions.
An example of tap gesture use in a multi-touch interface.
An Exploratory Study of a Touch-Based Gestural Interface for Elderly,2010
Easiness, Elderly, Gestures, Interaction, Intuitive, Learnability, Remembering, Understanding , Multi-touch.