My photo
I am an Australian occupational therapist, educator and researcher. I have worked as an OT in mental health, vocational rehabilitation and a private surgical hospital. I am passionate using online technology to enhance the knowledge and growth of the occupational therapy profession. In my PhD research I am looking at the role of online technologies in information management and knowledge transfer in occupational therapy. Views expressed and stories shared on this blog are my opinion and do not represent views of my employer or professional registration body.

Wednesday, April 2, 2008

Middle-Aged Users' Declining Web Performance

Middle-Aged Users' Declining Web Performance Jakob Nielsen's alert
  • Between the ages of 25 and 60, people's ability to use websites declines by 0.8% per year — mostly because they spend more time per page, but also because of navigation difficulties.
Mainstream Aging vs. Senior Citizens
  • A typical senior at 75 is 40 years older than a typical mainstream user at 35, so 0.8% per year should correspond to only a 32% slow-down for seniors however for people aged over 60 aging accelerates drastically, and especially after 70 years.
  • Curves of cognitive, perceptual, and motor-skill decline have a hockey-stick shape.
  • So, the 0.8%/year slow-down is valid only for the mainstream period of 25–60 years of age. For older users, performance declines faster. After 65 years of age or so, differences in user needs are so drastic that we require explicit steps to cater to them.
  • This is why there are separate usability guidelines for making websites usable for seniors.
Two actions suggested:

No comments:

My slideshare uploads