Gradual decline in visual and auditory perceptions, motor skills and cognitive
abilities make elderly into a highly non-homogeneous user group in terms of physical
and cognitive abilities. This affects their motivation, ability and self-efficacy in using
ICT. This has implications for technology and interface design [53]–[57]. No solution
fits all. Multimodal interactions and interfaces are an emerging field and include, in
addition to touch interfaces and mouse/keyboard, interactions with a system through
voice [58], gestures [59], tangible objects or the whole body interactions. Technology
design processes used to include participants who are less vulnerable and still active,
if they engaged elderly at all. Recently, there is an effort in the CHI research
community to design with intended users [60, 61].