Older people tend to be very positive about the prototypes which are presented to
them, wishing to praise the developers rather than give an objective view. If they
cannot cope with technology, they tend to blame themselves rather than poor design
[6]. They often experience anxiety, and can be negative about the amount of effort
required to learn to use computers, often increased by their assumption that they are
no use to them [15]. Age related factors can also make self reporting inaccurate (for
example, in questionnaires), with recent research showing that there are age
differences in the ways in which people respond in self-reports [27]. In addition,
challenges may arise because older people tend to tire more quickly [12], and this can
severely limit the duration of sessions.